Ending Contract

<p>Honesty now i really do not know what to do to ensure my contract is ending and no more debit after last debit in june i called and i couldnt go through on 081180 and the guy called me i told him i'm cancelling the contract to my suprise again on tuesday i was called for another contract and i asked the guy if it shows that i have requested to cancel he said no but now my question is what to do more to make sure contract ends?</p>