O2

I have just text to upgrade my big bundle to £15/month, which has been confirmed. But I want this to start from today although my previous £10 big bundle is not meant to finish until the 18th Oct. How can I start this early? I know I can call them bu...

Tried to claim my o2 rewards Amazon voucher last month but can’t seem to find the email to redeem it now that I would like to use it. Seems a struggle to find anyone from o2 that can help me too 