My top three:
1. Eircom (if we could, i would never deal with them again)!
2. Social Welfare
3. Sky
Also Smart Telecom reps calling to your door... so pushy... i told him NO not interested, twice, and he put his foot in the door and i ended up telling him to remove his f***** foot and closed the door very quickly! Its was a bit scary now that i think of it!!!!