Electricity meter running/blinking even with electricity off at the mains

[LonniSet]

Yes, that is a clear indication something is wrong.

The "running even with the mains off" clearing means something is wrong. Given the usurious charges they talking about if no fault found, I would get an electrician in to inspect the cables and CU (consumer unit = fuse box) to rule out some unknown load / theft of supply, and if they confirm the meter is running with no load then you should have no problem in getting if fixed and hopefully the bills going back corrected.

Hello there, this is what I intend to do if they carry on wasting my time.

 

[LonniSet]

I am posting an additional note in case it's useful to anyone in a similar situation: the whole thing is made more confused by the fact that I - like many more BG customers - was moved from one system (the Classic one) to another (I think it's called New Energy) last April, at exactly the same time where the highest rise was recorded. At that point and in just over 2 months they recorded a jump in consumption of almost 2,000 kwh.
So I suspect there might have been an additional issue with the migration process too, on top of a clear technical mistake.

Now the two systems do not seem to be in touch with each other, and the checking of the two accounts have not been coordinated at all, so it is a real mess.