Double deduction and not fixing my statement

I have an access facility and February I was double deducted(1. My normal deduction R1500, 2nd deduction being 3900). I was charged over R5000. When I went to the Braamfontein branch they phoned the collection department and they said they made a mistake they would reverse it. I explicitly explained that I want them to remove those transactions on my statement because it’s the bank fault, not mine. I’m currently looking into getting a car and no one will take me seriously with a statement with reversals on it, it’s the collections department and they should be able to resolve this themselves . The bank manager there Rungulani said he logged a ticket for me, it’s been almost 2 months and the matter is resolved. The same manager gave me his number said I should do follow ups with him and he will escalate instead of me coming to the branch all the time. Yet now I can get hold of him and he does not answer messages asking him to do a follow up. This is such an inconvenience because the banks mistakes are now costing me and delaying with things I need to get done. I have been with the bank for almost 11 years however I don’t know what is happening with this issue. Please get it resolved