SimpleSignal vs Fax2Mail

Multiple landlines being used. All lines have quality issues and at times so bad customer can not be understood. It sounds as a really bad connection as if a cell phone where being used and it was breaking up. After 3 months of verified problems they finally came out and determined some of the equipment was bad. After replacing some of the equipment we were back and operational with no problems. Now the same problem has come back up and we are again having to use our personal cell phones for company use even though we are paying close to $600 a month for their services. Quest came out and stated that there equipment is not even all hooked up. We can not get a simple signal technical off of their computer monitoring program to physically come out and look at their equipment. Also internet connection is really slow and at times don't even work. Simple signal states that if the other company that shares the lines is watching a video on the internet it will cause interference with the phone lines. $600 a month seems pricy if you can't use internet connection and phone lines at the same time. My cell phone is capable of this and it only runs $100 a month