Debit order problem

Good day I'm tired to just except being told that can't that I can't change my Telkom month to month contract from debit order to cash payments. Telkom choose to use an outsource company to collect eft or in-store payments. Vodacom/Cell C and MTN with all retail and even Clothing stores use there own account departments to allocate payments that is done eft or even in-store with in 24 hours or even sooner when you send them the proof of payments. I was an Vodacom customer of Vodacom and left there company for poor customers service and felt like the company is more important then the customers. So I want to know how many customers must leave Telkom when you realize that there is a big problem in restricting a customer on how to pay and don't realize that the importance's is the a customer is willing to pay. Now I'm being charged extra R200 and something.

Thank you Jan Olyn