Bad service and disappointing

I am very much disappointed with vodacom,,, I have been a loyal customer for 2 years,, my contract ended july of which I paid all my payments in time.. I went for an upgrade just before end of july and the new contract started now in August but to my surprise they deducted R280 from my cheque account.. who debit a client account on the 12th,, really now guys.. my credit score is at stake here...feel like cancelling the whole thing...