Several Cancellation Requests - still no help

I relocated 3 years ago and requested my contract to be caoncelled which didn't happen, I then continued to make payments even though I was not using the service or in the country. I have tried several times since to cancel my contract and am still receiving communications that I owe money on the account,

There is no way for me to find out what the charge is for on my account, why am I being requested to pay for a bill when I cant see what the charges are for? Please contact me to get this account cancelled and look into why I am being told that I owe money.