O2

Hi. My contract ends on 25th November 2019. I want to leave o2 to join three.1) I have been told that I can leave O2 on the 25th October for no extra charge. Is this correct?2) what will my final bill be - I’ll have one bill on the 25/10 (£30) but if...

Hello. If I am £20 in credit for my bill will my direct debit be lowered to cover that month?eg if my contract is £30pm and I have £20 credit will the direct debit for that month be £10?