Lesson learned is to change your electricity supply company every year.Sorry sparkrite! Basically the bill wasn't being paid as the direct debit was with electric ireland. Account was in the ltd company's name.
The change wasn't authorised at all paddybloggit which really irked me.
So after lengthy conversations it would appear that we were changed over accidentally. Our mprn was included in error in a batch that were changing over to energia. Perhaps naively I thought one would have to produce a bill and sign on the dotted line for this to occur.
The good news is we're on a very decent rate so all is not lost. Cleared the overdue balance and direct debit mandate has been set up. Phew!