Unprofessionalism!!!

I am appalled by the service that I received from one of your call centre agents. We've had cellphone contacts with Telkom for the past year, whenever pay day is over a weekend my debit order goes off on the next working day. August month Telkom decides to debit my account on the 24th whereby there wasn't enough funds and my bank charge me a R100 as the debit order was rejected. I queried this with an extremely unprofessional call centre agent Tshepo ref# ********** who had the audacity to tell my husband next time he needs to make sure that at have sufficient funds before pay day and that we've signed a contract with Telkom giving permission to debit a day earlier should our pay day fall over a weekend. This frustrated my husband immensely as he felt insulted by Tshepo. Tshepo is unprofessional and in my opinion does not belong in the call centre as instead of trying to resolve the client's issue he provokes the client. Why does Telkom ask you when taking out the contact "Sir/Mam on which days would you like us to debit your account"???? Who has monies in their accounts a day before pay day? I expect Telkom to notify my bank that it was an error and to request reversal on the charge or I will cancel my contracts and ensure people are made aware how unpleasant my experience with Telkom was.