Worst experience ever.

Worst experience ever. I received money on my account from someone who was owing me money but then FNB decided to block my account (***) for reasons i have no connection with. The account that paid me is now active and okay but my account is still frozen and i cant access my money or get paid from the people i offer my services. when i called to find out what's really the matter why account was frozen. the best they did was to give me a case number (***) which they say that someone made a complaint against the account that paid money to the account that actually paid me. so in this case i don't understand why i end up being punished for something like this? then i insisted by calling the person who paid me and told him to resolve this matter and find the complainant so that my account is opened as soon as possible so they resolved their matter and the complainant withdraw the case and their accounts were released but not mine until now, since Wednesday. Please this is costing me too much and i don't understand why other accounts were released and mine the victim is still frozen with my money