Poor services from Nedbank

I am struggling with an unauthorized debit order for a so called personal loan which they have deducted from my bank account. Event started in July 2020 when I noticed the debit order. I was lucky to got that reversed in July. On 25 August they tried again with 3 deductions and I could only reversed one. Why not the other 2 is still a mystery. Anyway I went into their branch in Marsh Street on 25 August spoke to 4 people on telephone even the ***** unit which confirmed I am not a nedbank client or have any products and was requested to log a service request on my side which I did. After several visits to the bank, phone calls etc I have still not got my R1700. 00 reversed. Today I am so tired and have no other option but to write this complaint. On Saturday I received a mail that a resolution manager handled my case. I am still awaiting my funds. Due to all this inconvenience I have unpaid debit orders... Please help