Useless Vox Telecom

I have recently tried to do a change of ownership with Vox in July, this they could not grasp and after more than a month, with them not being able to get this instruction, I decided that the only way forward is too rather cancel the contract and find a service provider who actually knows what they doing, once again Vox proved that they do not possess the mental capacity to grasp simple instructions repeated over and over and over. After about 2 month I receive an email stating that the contract is cancelled, yet for the last 2 month they are still charging me for the supposedly cancelled contract, when I query this I get told it cancelled I must contact the accounts dept, after multiple emails I have still have not even had a response from the accounts dept. Tomorrow the debit order will go off and then they are still going to tell me it cancelled. I have been with them for the last 3/4 years, their technical support is useless, I had a problem straight after installation and I tried to get it resolved, I spent probably 3 month going back and forth with them to get this resolved, shock horror, we never got it resolved, I then had to find a 3rd party solution to fix that issue. Their sales team brilliant, their after sales & technical Dept, basically a bunch of trainees who don't know what they doing.