This tends to happen when there are lots of people trying to use the network @Stephen71
There are some suggestions in the link below.
Guide: How can I sort out my network issues?
It includes reporting issues using the My Network app so that o2 can see where there are problems and if there is anything they can do.
Please note, this is not customer services and we cannot access your account. Do not publish personal details (email, phone number, bank account).
Link to our guide on how to contact them can be found here
