Trying to set up Online Account but old, closed account preventing this

I was an SSE customer, and was “migrated” to Ovo.

I also changed address a couple of years back.

Now when I try to register for an online account the system, the application process takes me back to details of my old address account. It’s as though it recognises my longstanding email address as being applicable to that old address. 

It would be easy just to give up trying, but I need to submit meter readings. Pressing option 2 on the phone merely generates a message that “the service is not available right now but you can wait and we’ll connect you with an agent.”

Cue elevator muzaak.

Then, after a couple of “The Queue is 10 minutes long” messages there is a brief brr-brr ringtone and . . .  disconnect.

I receive paper bills and so what I do is to take the (invariably wildly inaccurate) Economy 7 readings and work out my bill myself from my actual readings.

This isn’t an exercise in trying to reduce the amount requested - it can work the other way too. My last bill at the end of December requested a mere £47.92, whereas my calculation was for a much more realistic £216.42. I paid this larger amount by Bank Transfer and will be interested to see whether this is properly reflected on the next bill expected very soon.

A coupe of asides:

why have I been switched to receiving monthly bills after decades of receiving quarterly ones ? Is it an OVO thing?

will I ever see a meter reader again ?

(Signed, Unhappy Ed who just wants to be able to pay his bills promptly and accurately.)