Why has my IHD stopped working 2 days after the new meter was installed?

Have been trying to sort out problems I have with ovo and run into nothing but problems on chat and phone

I had a smart meter installed just before Christmas and the in home display went wrong 2 days later. Chatted online with someone who advised to unplug the display and leave 24 hours and to use the meter to display current balance by pressing the A  button.  The chat ended and I went to the meter and found no A button l. Tried to use the only one on there but couldn't find anything about ky current PAYG balance. Phoned ovo and spoke to someone about this and then they advised to plug the display back in again. This was done and the balance came up showing that somehow I'd used nearly £20 electric overnight. The heating wasn't on overnight and the only things on were a fridge, a kitchen light, my laptop and my amazon echo show 8. So how did thus amount get used? When I asked the ovo service person about this, all they kept saying was that us the balance show on their screen.

The other problem I have is that I had the warm home payment given to me and received a letter confirming this from ovo saying it would be added to my account on 18/12/2023. After I had the smart meter installed, 2 days later I received an email saying that I should top up my key meter by small amounts so that the warm home payment will be added. Since that email, I have topped up several times and still no warm home payment added!

Left a bad review on trustpilot and received a response from Fionn asking for my account details. Guess what? Still no contact nearly 3 weeks later. Contacted ovo chat and spoke to someone about this and they put me through to PAYG support, the chat said I would have to wait about 10 minutes. Nearly an hour later I gave up waiting.

Have really had enough if ovo. Why have I received such a fad experience with them? Their service us really poor!