Similar thing happened to us when we tried AIB. They only book appointments between 11 and 12 each day and the next appointment wasn't for 3 weeks. Went to our local PTSB and account was opened on the spot!
i found all banks needed an appointment, that suited them not me. and they all wanted a deposit in the acc, i think 100e.
ub opened and acc on the spot and no deposit needed.