SuperSonic - Just Plain Bad Service

Having been clients for about 13 years now, we were connected to a new fibre system about three months ago. In those three months SuperSonic have been totally unable to re-connect our VOIP telephones. We have had three Technicians sent out on four different occasions, but none has been able to get our phones working. Several interactions with our Account Manager have led to promises of reducing our account, of getting more Technicians, of migrating us to a new platform, but nothing has been done, and we never get feedback unless we initiate finding out what is happening. Pathetic.