I had a terrible problem with them in the past and will never go near them. I bought a top up from one of their machine in Dunnes store in Stephen Green shopping centre, I just grabbed the slip and ran so as not to miss my 25x bus, getting on the bus to top up, I realise the suppose top up isnt but a card with some maintenance instruction, went back to Dunnes and was to told to contact them directly which I did, the manager rang me back and was threatening me with all sort, that I must have been trying to open the machine in order to get such card. It was a very messy experience and I was so upset for a long time. A week into the case the machine was removed from the store, I guess more people must have had the same experience. Good luck and let us know the outcome.