Disgusted by the service from nedbank

My account has been frozen without notice because of large amount of money from my pension fund from my previous job,ive been going back and forth to banks since july of this year and no one seems to know why its hanging,i get told a gentleman of the name Cheslyn Johnson from group risk is responsible for my account being blocked..when he gets called he is always unavailable..its been months and when i go to the bank they say they will have him call me but nothing till date.the service from nedbank is so unprofessional.