Device and number not showing on account, can't check bills

[KylarSnow]

I've had a personal hotspot with O2 for just over a year, with a pay monthly contract and my O2 account, at the end of 2019 I decided to transfer my mobile to O2 and set up a new contract online, using the same email address.

This month is the first month I've attempted to actually try and look at my account since setting up my new device, but when I log in to MyO2, it only shows my hotspot device.

I get a monthly email about my bill for my mobile device, to the same email address, I tried resetting my password via the MyO2 app, using my mobile number, I receive the code, but then the app tells me it's not valid.

I can't call them, as they're telling me they're prioritising calls (due to the Roni) and then it hangs up on me.

Anyone have any ideas of what I can do to access my main device account details?

[MI5]

Keep calling 202 and if you get as far as the hold music, wait until answered.

[KylarSnow]

Should have said, when I do call 202 it asks what it's about and because it's not a priority the system hangs up, I never get to hold music

[MI5]

Say something else like "pay bill" for example?

[Cleoriff]

@KylarSnow 

Just press any option until you get through..