Unable to cancel expired contract

Tried to send emails to *** and phone *** in order to cancel an expired contract on my name. not getting any feedback via email and phoning the number I get through to an agent and as soon as I get somewhere they disconnect the call and send me over to the customer satisfaction survey machine. This is getting ridiculous now. going in to a store no one can help either and advise you that you can only do it via the methods I tried already