Ye it's a long story...This is starting to sound like a nightmare,
did you remove the storage heaters with your landlords permission?
did he consult his EPC inspector? This has potentially made the property unrentable.
It's good for you this illegal work was commissioned by a landlord,
I expect it has been done on the cheap like so many rental jobs.
Is the electricity account in your name?
Is there a managing agent? They can be useful as mediators when sorting out a mess like this. I'd ask them for a copy of all the documentation applicable to the CU change.
Yea the account is in my name and there's no agent.
I've contacted the landlord so hopefully it will be sorted soon. I don't mind if it stays like this as long as bulb changes the tariff to single tariff.