Cannot Cancel my contract

So I have tried repeatedly to cancel an existing contract on my line. The process goes something like this: Call 111, listen to the voice prompts, select 4 for cancellations, wait on hold for 9 min, get connected and im told that im not through to cancellations and they will put me through, I resist saying that \you are just going to put me on hold again"";PLEASE CANCEL MY CONTRACT WHEN IT REACHES MATURITY.<br> <br> THANKS"""