CRM Application with phone integration

We have a small business though several thousand customers and often the phone and messaging in general is problematic. Currently we are returning phone calls, answering some emails, and in certain individuals texting.

I'm in the process of building custom software to operate several procedures within the business. This is currently being developed independently but of course will eventually need to integrate with CRM.

I've noticed there are dozens of CRM packages out there but much fewer that integrate phone (voice). I'm looking for a comprehensive solution.

I'm virtually certain I will not hire anyone who has not done this before as my experience here is hiring developers who say, "I can do it" (yet they can't). If you have developed such software previously, please contact me so we can discuss things further.

Thanks for your interest in this project.