The way FNB bank treat there customer and service

Gooday the name is Abduragmaan Abrahams I am banking with FNB I am trying to have monies reverse that was debit from my account by FNB credit department I was retrench and my retrenchment monies was deposited in to my FNB account I have a policy with FNB life that covers my areas on retrenchment I send all my document to FNB life to put the policy in place and have been trying for 3;weeks just to get the monies reversed unfortunately I have been given the run around albbeing transferred from one person to other and nobody being able to give a answer at last was told to contact the legal team leader which I have tried phoning emailing with no response I been banking long with them and never thought this is the way I wud be treated I have been in the bank's on various occasions sitting for ours on there phone trying to sort it out even the bank manager start feeling sorry for me but cud solve my problems I really don't know what to do I just need a answer from them as this was my retrenchment monies I feel FNB has given me the worst of service and has no interest in helping there customer but rather avoiding there calls or putting up on hold i hope some one will a letter to help me sort his out as I don't know why to do anymore