I would second what mathepac stated above, in years of dealing with support for any type of support, Eir were clearly the worst experience I had. If they offered me free broadband and mobile phone for life, I would not take them up on it.
About 18 months ago I bought a mobile in an eir shop and signed up for a 24 month contract, no mention of this putting me into a bundle as I had broadband with them at the time. Unknown to me, getting the mobile triggered a new contract for the broadband at double the rate. I spent 50+ hours trying to resolve this & got nowhere, in the end I paid a lump sum to just cancel on principle so I could move on. On cancelling the broadband it triggered a new contract for the mobile, felt like I was in an infinite loop.
I change electricity every 12 months, etc and keep up with those things so would see myself as reasonably good at managing things. I really think more vulnerable people would be trapped with them given how hard it is to contact them and how unclear it is that one action triggers new contracts.
All I learnt from it is never use Eir again.