is there a creative way to calm them down?
how about telling them you are doing IT business (=masternodes) and trading forex (crypto)
then as soon as they unblock your account, start moving your fund discreetly to the bank mentioned by gentlemand
if you don't mind me asking, how big transaction in/out of your account caused them to be alarmed and asked you such questions
LHV bank in Estonia works with Coinbase and have continually made positive noises about Bitcoin.