FICA dept. freezes Trust account in good standing

I have had an ongoing struggle with FNB's FICA department since September 2014.<br> Documents were requested and supp****. Almost every month from then until February 2015 I received calls demanding the SAME documents be supp****. Explaining that these had already been supp**** meant nothing. I was then assigned someone specific to deal with. I resupp**** these documents to her and she submitted them internally. Then the threatening SMS's started arriving, your account will be frozen within 10 days if these SAME documents are not supp**** again!!!!<br> I have all the email correspondence supporting this. Each time I was told, we have checked and all is in order, just ignore the SMS it's auto generated.<br> On Thursday 25/06/2015 I received a call asking for the documents again. I explained they had been submitted to a specific person, while on the call to me she emailed this person who emailed her back and confirmed he had the documents. I was told all was fine. Friday SMS saying account frozen! No response from anyone. I keep calling them! Told just keep on resupplying whatever we ask for! I believe I am being harassed because it is a Trust. Is it reasonable to be FICA'd every few months?