CONSTANT DEBIT ORDER ISSUES!!!

Teljoy clearly has no proper accounts department or someone dealing with their accounts. Last month on the 15th of May i made to my account after consulting with their online agents, i further sent an email to their "collections" department to inform them of the payment made. Come 25th boom i get a debit order! I sent another email asking why. I never received a response. I reversed the debit because i will not be billed twice for one month. Then they start calling and telling me my account is not paid and when i ask them if there was no payment made on the 15th they said there is and then ask how is there no payment then when one was made... The lady can't answer. I got constant emails of how my account is in arrears along with emails. So this month i did not make payment instead i waited for their debit on the 25th which is a massive inconvenience to me because i get paid on the 15th but apparently as per one of their call center agents they will charge me an additional R18 for them to debit on my payday or closer to my payday... Moving forward they debited my acc on the 25th of June and they debit again for the same amount on the 28th. Which brings me to the conclusion that clearly they fail miserably at managing accounts and constantly inconvenience customers and their agents have no respect or knowledge of how things work because everyone who calls has their own version of how things work.