Before you expand into integrating a website with call centre keep in mind that there will be users sitting on the other end will judge you.
Users need to have an emotional connection to the experience of using your product. If you are merely creating an interface and not an experience, you have limited chance of gaining the following you need to make your product a success.
You can read more here: https://clarity.fm/questions/3298/what-are-the-best-practises-for-the-best-user-and-customer-experience-when
Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath