Nonsense charges on my account

I received an sms from you guys that my bill this month will be R600 and some odd rands. I than got in touch with your social media team to find out why my bill was so high this month. And this is the response I got was that the additional R 220 was a debit order rejection fee however a manual payment had already been made by the 25th of Aug. How ridiculous is it to charge half the amount only for my contract as a rejection fee...??? I would like my accounts method of payment to be changed to cash as I am no longer employed, and I would prefer to make manual payments going forward. As for the R220 rejection fee I’m sorry I do not have it. I’m paying for the service you provide to me and that’s about it.