FNB extremely poor service, no feedback nor resolved my problem over 2 weeks now

On the 28th of April 2021 I went to a nedbank ATM just after 6 in the morning to withdraw R3000 from my FNB business account. The ATM gave me my card back and then took a while and eventually gave me an error saying the transaction can't be completed and never gave me my cash. I phoned fnb just after 8am that same day and they sent me a form which i filled in and emailed back to them. After hearing nothing back from them for over a week I went into the N1 city branch on the 6th of May 2021 where i enquired what is happening with my dispute and the lady who helped me said they gave me the wrong form. She then gave me the correct forms to fill in and emailed it away. I asked her how long it will take and she said it will be 3 business days which ended on Tuesday the 11th of May 2021. It is now the 12th (exactly 2 weeks after the incident happened) where i still have not received my money back. I dont get any feedback from fnb and it is extremely difficult to try and get help telephonically. All they keep saying is that i must go into the bank. With all this said the service i experienced is far from greatness and this whole incident and level of extremely poor customer service is off putting and i honestly dont think i want to bank with them anymore.