No mobile data since 29 October in Swindon SN2 and SN3 area

When I finished work on 29 Oct, I noticed I had a phone signal but no mobile data, after it had been working fine during the day. I rebooted my phone just in case, but issue remained. When I got home I checked the Network Status Checker and it reported "we're fixing an issue in this area".

It's now two days later and it's still not fixed for this area, nor my work area SN3, as still no mobile data at the office all day yesterday, but the checker reports my parents' SN5 post code that is less than two miles away from me is working fine.

Is work being done to resolve this? All my years with Three and SMARTY I've experienced the odd outage, but never one that lasted this long.