365 overwriting office 2024 activation credentials

I have a pre-installed 2024 Office pro on my PC, recently outlook(classic) was being problematic whereby the usual fixes were not working, consequently did the longer MS fix on line which was successful, however, now I come to use word, excel etc and am advised only have 2 days left on free trial of 365 ( I have never used or signed up for 365 nor do I wish to), I have signed out of my account, signed back in restarted etc etc all to no avail. In my account it tells me 'awaiting activation'. As this was pre-installed I do not have an activation code, I wonder if anyone has come across this issue and a remedy for it - any advice much appreciated - Terry