Bad service

I logged a call on 26 May 2018 about a debit order dispute. I was told that since the debit orders I am querying about would take up to 40 days to resolve. I completed the forms and sent them to FNB and received a reference number [REF: ********** 6_ ********** 81]. A period of 40 days has expired. I made follow-up calls after I was told that my query has been escalated and on Wednesday, 11 July 2018. The name of the consultant was Thapelo and he told me that the query has been escalated and that someone by the name of Lerato from the escalations team will call me shortly....and to date Lerato has not called me. I have made several follow up calls and every time when I call I am placed on hold for several minutes and many of the consultants I have spoken to keep on making empty promises. Another consultant by the name of Nonhlanhla even hanged up on me. I called her back and she said she didn't know what have happened and I asked her of why didn't she call me back then....incase I ran out of the airtime and there was no answer to that question. I asked her to put me through to the management team and she then placed me on hold for about ten (10 minutes) and when she came back she told me that all the managers are at the meeting. She promised that she will call me back by close of business yesterday on Tuesday, 17 July and that did not happen. One of the managers by the name of Nicole also promised me that she will call me by close of business and that was on Monday, 16 July 2018 and that also did not happen. When I called the following day I was told that she is off sick and my question was 'Does that mean that if Nicole is off sick the show stops?' In my opinion FNB service is shocking and ironically when you contact the sales department the service is phenomenal. Surely FNB Dispute team needs accountable consultants and managers to keep FNBs flag higher like on their sales department. What an experience....could someone please give me a call on ********** to discuss this matter further ASAP?