Phone Company Woes - Broadview Networks and Verizon

Based on a client recommendation, I selected to go with Broadview Networks as my company's phone service provider. They are simply a Verizon reseller, so I guess most of the fault is on the shoulders of Verizon. People who called my main office line, sometimes, were sent into this voicemail system that was not set up. So it asked the caller to enter in a pin #. This was happening for over a year. I called Broadview numerous times to complain and get it fixed, but it was never fixed. It seems like the problem, 1.5 years later, has finally been resolved. The issue was that someone at the phone company set up a call forwarding on my first two lines and the forwarding triggered the calls to go into this voicemail system, that I never thought I had. Its hard to estimate but I would venture a guess that 25% of all phone calls to those numbers were sent into this voicemail system. Finally someone called me today to tell me they found the problem and that is has been fixed. It is about time! So I called Broadview to tell them and they tell me that they can issue a $50 credit. What would be your response?