on 31-03-2022 20:25
on 31-03-2022 20:31
You need to change your tariff in your MyO2 first https://mymobile.o2.co.uk/
If you message O2 on Facebook (https://o2uk.co/O2CFB) , Twitter (https://o2uk.co/O2CTW) or Instagram (https://o2uk.co/O2CIG) , they should be able to help you with this.