Bad service and empty promises

I don't even know where to start: 1. Not canceling my contract even though a cancelation request was sent more than a month in advance 2. Being charged an extra month cause they did not cancel the contract as per above. 3. Being made all sorts of promises in terms of investigating above and providing credit, it has been a month, and no feedback or record of issue being attended to. 4. Sunday they said they will request recordings, it should take 48. That ended yesterday, but not a single call the whole of today