Cost increase

How does Bulb justify an increase of 155% after 2 months of supply, and without further meter readings??!

Check this it may help in explaining it to you.

https://community.bulb.co.uk/discussion/7804/have-we-been-sold-a-pup#latest

If you haven’t supplied meter readings for two months then your usage will have been estimated.

Seems a problem of your own making? It’s best to submit meter readings monthly to keep your account up to date.