Thanks for all the helpful replies.
They spurred me to ring the store and ask for the manager. After a series of phone calls throughout the day, they were still offering only to get the service engineer out to me in 3 working days (next Tuesday) and even if he agreed that it was a dud, it would still take another 3 days to get a replacement from Dublin. They did offer me a discount/credit note of e50 for my trouble but I was not happy with the prospective timescale so I finally asked for a refund - to which the manager agreed. I took the freezer back to the shop last evening and got the refund, went across the road and ordered a new freezer from Kiely's for delivery next Monday..... If there's anything wrong with this one, I'll end up in the mental..... Cheers.