Started my first business in 1974, been going strong since. My business portfolio is varied. Recent focus has been setting up 10,000+ reqs/sec WordPress sites. Most hosting companies can barely make 10 reqs/sec. Anyone expert who tells you "WordPress is slow"... Do a 180 + run, as likely their incompetence is pervasive. For example, SERP Shaker WordPress sites I've been setting up recently clock in at 7,000+ reqs/sec. In November + December 2014, one of my clients ran sustained traffic, all day, every day of 100,000+ unique visitors/second on a $100/month dedicated server machine at a load of 5%-10% of capacity. If you site is slow remember, site speed depends primarily on the tuning of the server machine where your site is running.
Tip: Always have a revenue stream you manage as a single person (no other people required) which produces 3X your monthly living expenses.
What you're asking relates to niche/business.
For example, for a cafe manager this question makes no sense, because during a Pandemic (I'm guessing this is what you're talking about) a cafe manager is at home.
A project manager working managing people working from home, will have learned how to accomplish this from years of experience, custom crafting how they do this to the exact team member personalities being managed.
In general, far better to hire people which require little or no leadership/management. People who simple do their work with no oversight, producing stellar work product.
If a team consists of this type of people, they lead themselves... for the most part...
100s of ways.
Start by reading the book "Free" by Chris Anderson for a history of old style + new style approaches.
Then hire a bunch of smart people for an hour each to tell you how they'd monetize free for your project.
In fact searching for - how to monetize free apps - returns 25M results for me, so likely this search might be a good starting point for you.
Also study Podcast Monetization + Radio Show Monetization, both of which have been monetizing audience free content for years.
Two years is a lot of lost time fighting over $1000.
The $1000 is only worth fighting over if the lost time involved could potentially less than $1000.
Most credit card terms of service only allow for a short window to file + resolve disputes... sometimes 6 months... usually 3 months... so it's unlikely you can get this handled through normal channels.
Alternative: If the $1000 is really worth continued time spend, then draft a letter to Barclay's CEO + all board members stating the problem + the exact resolution you'd like, which in your case will likely be a $1000 card balance credit.
Tip: In the future, use PayPal, where you can more easily dispute charges.
If you can find what you're looking for by using a Google API service, then the answer is yes.
If you must scrape Google search results, Google is smarter than you or any developer, so will eventually figure out you're scrapping their data + completely block your IP.
https://commoncrawl.org - provides an alternative, as they provide a massive corpus of crawled content from millions of sites... so... if there's no Google API which can provide you the data you're after, consider using the Common Crawl datasets.
There is no way to determine differences in your code + his code.
Suggestion: Avoid working with people outside your own country of jurisdiction/domicile, because anytime another government goes south, you can lose your entire development staff.
I've had many clients who have lost small fortunes with Chinese + Russian developers simply disappear.
Consider hiring a developer to audit + document your code, so any developer can take over the project at any point.
Tip: You'll likely generate far more income, spread across far more clients, working freelance.
I've been working as a Fractional CTO for decades.
If 1x client drops out, there's another 10x on my waiting list.
Or, if I require a cashflow boost, I just take on a few additional clients.
Working for 1x client you're looking at a 6 figure income.
Working for 100x clients, you can easily hit 7+ figures.
Tip: Book calls with Clarity folks you have affinity with (their answers make sense). Provide them details of your experience. Ask them how they'd tool their offerings to produce whatever target income (monthly net) for a given amount of time (hours/week) worked.