Poor service and false advertising

I have purchased a telkom contract from mondo communications the problem is when I told them that there is no telkom signal where I stay they told me to check within 7 if not working Im entitled to cancel the whole transaction. I did that but to my surprise they debited 243.60 from my accounts and the same month again they debited 893.40 and again 248.60 in three weeks.what annoyed is the simcard are block I didn't used them at all but money is deducted into my account