Telkom LTE account termination issues

i requested to terminate my Telkom LTE service in Aug 2020 and it was done the same day after i responded to advise by email from Telkom Technical, BUT they are still sending me monthly statements and submitting the monthly debit order. i have tried in vain to contact them by phone as i only get as far as their plastic secrarery - phone number 081 180 on the statements says that it does not exist and weith both 10210 and 10213 i only get as far as the plastic secrasrary as none of the number selections seem to work - i have tried the landline and cell phone - same results. can someone please advise?