Phone cut off, app dosnt work

[CHF]

So a direct debit bounced, so O2 have cut my phone off since Saturday morning & I can’t call them & the app is useless 

What or how am I meant to contact them !!?? 

[Cleoriff]

@CHF 

Use Skype Guide: A Guide to Skype 

You need to contact Payment Management

You can reach the Payment Management team on 0800 902 0217 or 0800 032 5302

The opening times are:

Monday to Friday – 8am to 8pm

Saturday – 8am to 6pm

Sunday – 9am to 6pm

https://www.o2.co.uk/help/account-and-billing/payment-support

Best time to call is around 8.00am