I could be wrong, but as far as I know it shouldn't cost you anything, ESB should move it as it is their pole on your land, and they will if you let them know about it.
Not sure how long you may be waiting for them to do it though.
I had to get them to move one at my site as it was dangerous where it was and the line was crossing the line of my site they remove for free when you can prove that there is a need for it to be moved. Telecom however are completely different.
