Bad service delivery.

This is not my 1st time not receiving service from this so called FNB Bank, Paid forex to my business account on Saturday and told by the cashier the money will reflect to my account Monday morning which is now as from 00h00 on to be told now that its a dollar holiday today and will now only show tomorrow which would be Tuesday. This is SOUTH AFRICA and not the USA our reserve bank is not on public holiday to day. So why should I wait for this to clear.