Sorry to hear your issues @CCC1979 - they sound exactly like what I experienced since I transferred in from Giffgaff in early December. I had a split port and all sorts of issues for which I received useless suggestions from the support team on 202 that had me running in circles - similar to yourself. I got to a point after a week where data was working and where I could receive calls on the temp number. Things seemed to incrementally get better around 9-10am every day, so maybe worth rebooting next at that time.
In my case it took 25 days to get my old number semi working, but even then - only users on the O2 mobile network could call or text me - ironically meaning that the helpdesk couldn't even send me a security code or call me back. Another week later for me, and things are now almost working about from a few weird issues.
My advice would be not to bother harassing 202 - at this stage, they just add a note to say that you've called to your existing open ticket, or if you push harder, they create another ticket which complicates things later and can reset the response timeline. They're not able to do anything other than simple fixes or escalation, so it's a waste of your time. I had better experience with the social media team on Facebook, but again they will largely escalate - but can give better feedback and fix account related issues.
Other suggestion would be to visit an O2 store, and ask for a SIM swap (it's free). I did this at an early stage and it improved things a little in terms of getting the temp number working better, although the assistant thought it was 50/50 that it might just fix all the problems.
Good luck, be patient - there does seem to be very little you can speed up. I also wrote a letter of complaint which made me feel better, but hasn't been answered yet.
