Unhappy Client

On the 01.05.2018 I had a debit order deducted for R890 and I had requested from FNB to reverse this Unauthorised Debit order which I assumed would be an easy enough request, I have been calling and sending a direct message to the Premier Banking via the App. I was advised it would be done in about 3-5 working days, now to be told that I have to call another number and try get this sorted out, I still do not have my money and I am considering changing banks as I am not happy with FNB service as a premier client this is horrible service, now I have to call other numbers and try and get this resolved after filling in a form as requested by FNB, then last night I get a SMS to rate the service received from my request to reverse my money which I was not authorised in the first place and I rated then unacceptable. I have never been so unhappy with a banking service in my life and now HOW DO I GET MY MONEY BAC****!!!!!!!!!!!! I want this sorted ASAP! I will be considering taking my business account and personal accounts away from FNB!