Real Bad Service on cancellations

Very dissatisfied with the service Month to month has to be paid in advance, if no data used still reliable for bill asked to cancel got a bill to pay for 2 months! as they say we can't cancel over the phone proceeded to canceled on portal at the start of May, How can someone pay for something not used after cancellation 10 people phone and still not cancelled finaly got a e-mail of the cancellation after someone phoned but then it could be cancelled over the phone? about 5 e-mails sent just to get this matter resolved no one phones you, you will receive calls 10 days afterwords, Received a letter that they will give the account to a 3rd party for collections, Collections on something not used!!! can't see if none of the service provided was used also need to courier my own router back to them as they will not collect it due to non payment all of the providers I have been with was first use data then pay the excuse they are own provides. Still waiting to hear from Fiber as our area are live but they don't get back to you! Thanks I will switch to a cheaper and more convenient provider.