Account Frozen

My husband is a farmer and the money for the sale of our wool was deposited into a money market account under the same name. SMS messages were sent to his phone telling him to confirm his income. There are so many *****ulent SMS's now that we deleted the message. They have our contact details e.g phone numbers, email address and the "secure" chat on the app, as well as financial statements showing that we are sheep farmers etc. but they blocked our account , supposedly because the money could be *****ulent and we have to prove that this is a legitimate deposit. No-one I have spoken to has ever experienced this and the sooner i leave FNB as a client the better it will be for me.