Not canceling contract's

<p>Have requested that they cancel my contract over a year ago for my data subscription as the sim cards no longer work and I wanted to move to a land line but they have still not cancelled the contracts and they are still deducting money from my account for a service that they no longer provide!!! This is by far the worst customer service experience iv ever experienced and they have lost a customer indefinitely! Hellkom do your job and cancel my contracts as iv requested for months now this is just ridiculous</p>