FNB Merchant service withholding payment. Unfair treatment

I have banked with FNB for around 20 years. I am a Speedpoint merchant. On the 11 September 2023 I processed a large transaction with a client using my speed point machine the amount was around R200K. I expect these funds to release a bit slower as I understand there are some anti ***** protocols to adhere to . I put a call in on Thursday 14 sept 2023 to enquire why funds still do not reflect. I was issued a ref number and told it will be escalated. On Monday 18 September I still did not receive the funds, so I put in another call. The operator informed me that the money was released and that the funds would reflect that same day. on 19 September the funds still do not reflect. This is now the 6th working day since the transaction and the funds still do not reflect. I called FNB Merchant services again. I was issued yet another ref number but no resolution was offered except to say its being escalated again. no amount of insistence on my part would enable them to allow me to speak to a person in a decision making capacity. I am beyond frustrated and feel that my business is being very unfairly treated and that interest and cashflow ramifications are very severe.