Cancelled contract - but still being billed exorbitant fees and charges!

Acc number; ***

We had recently agreed to a contract with telkom via a telemarketer that continuously hounded us, who assured us that should we change our mind within the cooling off period we can cancel within 7 days. Since we had fiber, we realized that another contract was not needed, so we called and cancelled on day 4 of the cooling of period. We were assured by a telkom agent that it is indeed cancelled. (spoke to Zaida ***) Now we are being debited for that same cancelled contract!!! And that too, three times the original amount. This is absolutely unprofessional, ********* and total incompetence from Telkom. Why are we now being held ransom when we are clearly within our rights?! We have names, times of contact and references for all conversations, and intend to legally take this up should this thieving provider not cancel our contract immediately! Kindly contact me back to confirm cancelation.