Ongoing dispute between Bulb, address and smart meter

hellok

Hi,
I bought my flat last year, which used to be an airbnb. When i first moved in, I realized my meters' serial numbers were linked to different addresses, spent at least 3 months to sort that out with British gas, and with a smart meter installed. 

Then I switched to Bulb, again I had spent at least 2 months trying to have my address updated with them. After those long calls with different energy companies, COVID19 came. I didn't check my account until yesterday, realized for the last 2 months they had been charging me over £100 per month. I am a 2 people family, while we both can't work from home. And I had lived in places with lower branding, but never over £100 in any month in winter. 

phoned them up and realized my meters' serial numbers were still linked to different addresses, and I was told the readings from smart readers were actually not accurate ( couldnt be read by Bulb, while they had been taking reference from the smart reader for monthly payment). 

Does anyone have had similar issue before and can tell me where to start with ?

I had a conversation with British Gas before and they assured me my meters only served my place. 

thank you so much 

MWT

Two separate issues.

First, for the billing issue you need to make sure you have provided meter readings and that Bulb are using those for your bills.

You will need to continue to provide monthly readings (at least), and watch your account balance to make sure your payments are keeping pace with your consumption.  Do also check that the meter 'serial numbers' match the number shown on your bill.

For the address problem you are going to have to work with Bulb to get it fixed. As your supplier, Bulb are the ones who need to get the central database updated.