Telkom is the worst service provider in South Africa

I requested from Telkom on numerous occasions to cancel my debit order. They refuse to do so and continue to try to take money out of an account that does not have sufficient funds for them to debit from. I have explained various times to them that they will not be able to do a debit order and that I'm currently paying in via EFT. Yesterday Telkom decided, that apart from them receiving my money every month via EFT, to suspend my services, because according to their system my account is in arrears. There is no arrears, because I have proof of my payment which they gladly accepted each and every month via EFT. Their arrears amount is because they are unable to do a debit order and that is the fees they charge because of debit orders not going through. Is Telkom just money wolves? How on earth is a company not able to cancel a debit order from an account, but rather receive the money via EFT, still tries a debit order as well and refuse to cancel the debit order on request, and then suspend services because the debit orders has not gone through? I'm sick and tired of their excuses of not being able to cancel my debit order on my account. They do not want to refund me the money that I paid via EFT and they do not want to reinstate my services. Now they want to tell me that if I want to cancel my contract because I do not receive any service from them, I have to pay a penalty fee because my contract is not yet in full terms. Who is breaching contract here? Not me!!!!!! Any other company in South Africa cancel debit orders on requests from the client, on the condition that the client then makes manual or EFT payments into their accounts. What makes Telkom so special not to do the same? Spoke to a manager, Charmaine Ma***o at Telkom, who even had the rudeness to put the phone down on me because I insisted that my debit order be cancelled, insisted that my account is paid up to day because I do not acknowledge any arrear amounts on my account due to them not wanting to cancel my debit order, insisted to re activate my services. She refused and dropped the call.