FNB Relationship banker

At the beginning of Feb 2015 FNB share investing deducted a large sum of money from my bank account without any instruction or authorization. This affected my vehicle & home insurance debit orders etc. as it cause my account to go in arrears. I contacted the relationship banker who was not available. I done an online and telephone compliant and was then contacted by a FNB relationship banker. No-one contacted me from FNB national customer services and the relationship banker made false promises. I was promised that my money would be returned on the morning of the 9th Feb 2015. I'm still awaiting the return of my funds. FNB's relationship banking does not execute the client's instructions and they make false promises.