Dump as FNB

My name is Rethabile and my fnb account number is ***, FNB is the worst Bank ever. FNB frozen my account for almost a month now without given me good reason of freud allegations claim on my account. Are you telling me FNB is too dump to know about selling and buying of bitcoins...? I made a trade of 550r on the 10th of January with someone on paxful the most common online bitcoin trading agency! To cut my story short FNB had to frozen my account with over 4000r in it because of 550r ? The most stupid thing is calling FNB freud department at home or at there nearest branch but they won't calls or return call. I won't rest until my account is unfroze because i can't go to school before of this money in my account