First and foremost, telemarketing only accounts for 2% of a companies revenue. It's not scalable by itself. I made 72,000 calls in 12 months in the real estate and insurance industry. Cold calling worked, but not by itself.

There are six avenues you can take, including what you're currently doing:
1. Telemarketing
2. SEO Content writing targeting keywords
3. Create a click funnel and launch it on social platforms that agents hang around. You can also test out FB ads.
4. Networking - there are a ton of networking events that REO agents attend - this is more of a long-form approach, but should be done.
5. Google Ads PPC - you need someone that knows what they're doing here, but you're probably competing with a ton of other companies.
6. Social selling - use social networks to DM agents offering your service for "free" for a limited period of time OR ask them to evaluate it and get feedback.

There is no one method for generating MORE leads. I would like to know more about your service so I can get you better answers.