Telkom double payments

Bad experience with Telkom being back and forth but struggle to through to a consultant for assistant. Initially after an enquiry I made via the Telkom branch which was based on my Telkom contract which was due including the adding fee for purchasing airtime I was advised to make payment at any Woolworths store which I did. The same day after I made the payment a debit order of the same amount of R1245 was deducted. I called and spoke to a few agents and which couldn’t help me because I needed to send prove of payment and debit order. I called again days later on their head office but I’m always advised to use the WhatsApp method n it doesn’t give me the option for my query. All I want is for Telkom to return 1 payment to me because I know reversing it myself will affect my behaviour credit wise….