My bill has become more expensive

[jian]

I used to pay £15 per month so why did I start paying £16.75 from month 6?

[jian]

Do you need my phone number?

[Bambino · Accepted solution]

@jian Do not post your phone number. This is a public forum.

As to your query, it's the annual Retail Price Index increase which you agreed to in your Terms & Conditions. All explained here: Prices | O2

[Cleoriff]

@jian 

It's the annual Retail Price Index. Happens every year and parts of the terms and conditions.

https://www.o2.co.uk/prices