Poor service from telkom agents

I signed up for the May big deal and i received my package and all was well when i signed up for it and i clearly stated that the debit date should be 26th of every month surprisingly on 25 June 2019 Telkom debited my account and it bounced I thought they will try to debit again on the 26th of which they didn't i saw days had passed i decided to make an eft now not only did i have to pay for the returned debit due to telkom agents that are ***********, upon receiving my monthly statement i discovered that there is a R212.97 PENALTY FEE that i have to pay because of a blunder made by the telkom represantative who signed me for the May Big deal since this was an error caused by the agent who assisted me i believe that agent should carry that cost. I called Telkom customer care to check for me who signed me up so that the matter could be investigate as i believe all calls are recorded because i asked that my debit date be 26th of every month and it was agreed