Refund towards a settled contact that is also prepaid but debit order still running.

I am so disappointed with vodacom as I settled my contract with them but I am still been debited while my contract is even prepaid account. Shocking was speaking to the call center agents to a team leader to a coach as well with money that is due to me but all to be told that money was credited to my account not bank account but still debit order still continue. It's sad I had to wait for 14 working days which only to find out there was mistakes from their side which yesterday I was told to wait for another 14 days I don't know what to do anymore I need help as it's over R1000. 00 due to be paid back to me and also was mentioned I need to send bank statement for them to process. Please help me with chanells to follow to get to the bottom of this I have prove of emails I received with documentations on my side should prove be requested. Wish I was done paying my second contract which is ending next year in July only and I will have to put up with a company I hate. Ending everything close to me, family and friends from Vodacome.