Revolving credit account

My private banker said I must go into the store to update my tax infol because i cant access my availablefunds.So I went on Monday and lady at Fnb reset my account and update it.and told me everything was good.At home still I couldn't access my available funds and again I chatted with my private banker only to hear that apparently they put a block on it but they can't see why so they requested it to be uplifted..that was Monday the 09th June..Nothing changed since then no explanation nothing. WHY FNB?