Unauthorized debits from my account

<p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: 15px; color: #9b9b9d; font-family: 'Source Sans Pro', Verdana, Geneva, sans-serif; background-color: #ffffff;">Can someone from Telkom please explain to me as to why my account has been debited even though I cancelled this contract in February 2016.</p> <p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: 15px; color: #9b9b9d; font-family: 'Source Sans Pro', Verdana, Geneva, sans-serif; background-color: #ffffff;">I have explained that since I bought the wifi router, it has never worked and the adverti*****t had said the contract is for R199, they have pulled amounts ranging from R500-R2000 since December 2015.</p> <p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: 15px; color: #9b9b9d; font-family: 'Source Sans Pro', Verdana, Geneva, sans-serif; background-color: #ffffff;">I have no way of contacting this company as they have no working line...strange for a telecoms company. I have walked into several Telkom shops and was assured at the Sandton branch that the contract has been stopped. I even gave the device back, but to my bewilderment, R2000 was ********ly taken from my account this month. I can't keep going to the bank to cancel these debit orders every month, so can someone please confirm what the problem is.</p>