Blocked standard bank account with no valid reason

Standard bank ***** department team has been giving me hard time .they blocked my account last week Friday because of the money that I received from my peer to peer investment and after they said I must go to the police station to make an affidavit stating that Where's the money coming from which I did and after that I have been the one who's calling Standard bank regarding this matter and the sad part since Monday they said they're escalating the matter they will call me after 48 hours but no one has called except me calling them because I am in need of that money that is in my account...I don't know what to do in this matter my contactable number ***