ACN Digital Phone Service vs Ooma Business Service

I have been a customer for a year now. The digital phone adapter I got was defective - having a normal phone conversation impossible. It took tech support awhile to figure out that their digital adapter was the problem. They were very helpful I must say and offer to replace the equipment. I have to use my cell phone to complete my calls because my caller constantly experiencing problems hearing me. It was annoyingly coming in and out. It was very frustrating having to repeat yourself all the times. What could be a 5 minutes conversation ending up being a 30 minutes call because of constantly repeating yourself. This was right from the start. I thought the issue would go away but it did not. All this was mentioned in my notes with tech support that I have been having the issue for the whole year. I barely use the service. The new adapter seems to be okay so far. I asked tech support if there is anything they can do like a courtesy credit for their faulty service. He advised me to speak to customer service. The lady bluntly told me that the fact that I had service - faulty or not they will be no credit. She also said tech support is aware of the issue ( from their note on the system) let them give me a credit. Their definition of service is once the phone make a connection that service. It does not matter if their adapter is faulty and the quality is so bad that you have to you your cell phone instead. Two thumbs down ACN!