unpaid debit order charges when Telkom not acknowledging termination of contract

3months before the contract could end a written confirmation was sent which was not acknowledge,then went to the Galleria branch and filled out cancellation forms twice and to date same is not acknowledged.I am being billed for 2 contracts and when there is sufficient finds for one contract same is returned charging me unpaid debit order fees.This is going on since October and despite numerous e-mails sent to date no response yet there is a 'read receipt'I am having to more more unpaid debit order charges the the contract itself. This is a '*******' from Telkom.If the debit order the is the 31st and same falls on a public holiday or weekend Telkom debits a day before,companies only pay after not before and there again you are being billed for unpaid debit order charges.Im sure Telkom is making more money in unpaid debits than the contract itself.The worst is the customer service never responds to you.