Overcharged bill

I did a request to Telkom to do my debit order on the 25th so they changed and informed me they will do it on the 26th October but now I have the problem with them charged me R202 for a debit order not going through and forwarded them proof that my money was in my bank account on the 26th even the my bank statement show they do request for payment on the 26th I did all the proof to Mr Sibusiso Siwela after our telephone conversation. Please they must change their extra charges