Thanks for sending the requested details via PM. I have escalated this over to our technicians and a fault ticket has been raised for this.
This could take up to 5 to 7 working days to fix, depending on the issue, but please be aware that if there are network issues causing this problem, it could go past the initial 7 day working estimated resolution time.
I will be back in touch with you as soon as I receive an update. I'm sorry for the inconvenience this causes.
Any credit for degraded service will be applied once the fault has been fixed. If you have been in touch with me via PM, I will contact you to discuss this further at that time. Alternatively, you can get in touch with Customer Services direct once the fault has been resolved.
I understand that there is a temporary workaround with this by toggling airplane mode on and off.