Subscription changed without consent

I have a weekender contract that cost me R287 a month. Since I have not upgraded after the contract expired, Vodacom deceided themself to start charging me more and now I pay R369.. How convenient.. Last month my debit order was according to Vodacom stopped at the bank. I asked them to re-instate the debit order. Guess what, it was not done... How pathetic!!! And guess what, my services have been suspendid because of someone not doing their work or someone that is to *********** to do their work!!!