please i need help on my acc

Hello,my name is SEUN ADELOLA have been banking with FNB for more than 8years FNB freezed my acount last week.i borrow a friend R50,000 in JANUARY this year and we did agreement and i also collect his pasport data page and we have another friend as witness all of us sign the agreement.last week the guy pay me the money i borrowed him into my acc which was on wednesday 24th of july 2019.on friday 26th of july 2019 i want to send money to my wife i notice the acount is not active then i went straight to fhb brnach to lodge a complain and they told me i received ***** money in to my account which my friend sent to me.and they gave me number of investigator officer and i called her she asked me to send proof of the money and the agreement with i did and i call the lady back she said she's not on the case again that the case has been transfer and have been going to bank since last week i did not hear any response from them please help me this is affecting my day to day activities .

also the guy that sent me money has went to his branch to tell them that the money he sent is not *****

pls i need help