I can’t top up

[Elber9]

I can’t top at all despite having the correct debit card details 

[Bambino]

@Elber9 See this guide: How to Top Up (PAYG) - O2 Community

If it's your first top up you need to do it by voucher.

[Elber9]

Hi There, I’ve been trying to swap from £10 Big Bundle to £20 Rolling Plan and entered the correct card details and it still won’t go through.

[MI5]

@Elber9 

We’re just customers like you but it sounds like you’ll need someone to access your account which can’t be done from here. 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, or call on 4445.
Thanks