Unreliable departments and staff

Signed up for a fibre connection which they could not arrange, they sent me a ****le and when I tried to cancel the contract, I was not able to get hold of the cancellation department. It took months and the account ran up. Now I am paying an account older than 6 months old even though I only used it for two months or so. You can't get hold of the accounts department, you can't get hold of the cancellation department nothing, no email responses nothing. Worst experience ever, will never take anything from them again.