Hi,
I'm checking back through my bill's and my plan price was increased last year.
According to this link because my I took out the contract before 1st November 22 the increase should not have been applied to my contract. I took my contract out in March 22.
https://www.idmobile.co.uk/cpi#:~:text=Your%20monthly%20plan%20will%20be,(%2B3.9%25%20fixed%20rate).