Can't top-up PAYG O2 phones on myO2

[JasonUK1]

Hi, I need to top-up some PAYG mobiles for myself and other family members but after signing in, selecting amount to top-up, enter my address the site should allow me to enter card details but the page is just resetting with message: 

It looks like something's gone wrong
We're looking into it and hope to get it fixed soon.

This also applies to the general web top-up page too:

https://myo2payg.o2.co.uk/webtopup/details?journey=guest&isIELessThan11=false#/

When is this likely to be resolved?

[Enlli]

We can't tell you as we are all customers here.

Some other ways here or ring 4445

Guide How to Top Up (PAYG) 

[pgn]

You don't need to sign in to top-up, @JasonUK1 

Try this link:

https://myo2payg.o2.co.uk/webtopup/details?journey=guest&isIELessThan11=false#/