Dstv shucks!!!! big time

after sending a ton of emails between myself and multichoice I was assured that my subscription for extraview and compact were cancelled effective 02nd Jan, to my horror the billing is still the same, to make matters worse they disconnected my services without notification, on the 2nd I went to house n home to pay my new subscription fees only to find that they are still the same, how can I pay an amount that I didn't authorize??? the only reason multichoice is still in business is because there is no competition in south Africa, otherwise they would have went under a long time ago, please sort out the mess!!!