bad service

had contact router which had a connectivity problem the could not sort out for a month, after all the ups and downs I cancelled their contact and also they took 3 weeks come collect, they eventually sent the courier after 2 weeks which was beginning December, end December they debited my account AGAIN, I get charged charged for all these reversals and it makes me look bad , like i am running away from my debts, can Vodacom sort this out please