telkom debit order *****

I bought a laptop contract for R299 p.m however deduction gor this product had been going off along with some ridiculous amounts for R5000 , R1550, R4000 where some have failed and bank charges has been charged due to in sufficient funds I have reported this but they say they are investigating. I have ran out of patience waiting for results and what this to stop witg immediate effect. The monies deducted are affecting my daily life as food and life is not free . I need this to be resolve asap dont want the product if this is the case . Help is needed urgently as my bank is getting ***** by these deductions. Should I open a new account? I don't want more money taken as the reversal process takes forever.is this a breach of hontract and how am I protected as a south africa consumer the bank chargers and credit rating will be effect as well. I would like this to stop and be awarded for all amounts as well as bank charges and destress caused by the humiliation telkom has caused.