Shocked and disgusted!!!!

I am extremely upset . I just received my bill and have been charged R202.70 for Payment rejection fee. On the 1 Aug when the debit went off i did not have money in my account I chatted to Londiwe and advised of my Error and got the banking details and made payment the same day. Why am i being charged this fee? I cannot afford the amount you are wanting to debit . Ive never had this issue with Telkom before and I already get charged by the bank for this fees. This is ridiculous. I made Telkom aware of my Error and immediately rectified it! I want this to be rectified immediately and credited and removed. What is the point you chat and advise a consultant of what happened and the issue and fix it and then get billed a ridiculous fee! When asking for assistance via chat again I got generic responses which doesnt help me at all and get told no credit will be done, are you willing to loose a customer