If you clicked redeem and generated the code, I'm going to guess it will expire on the 30 of this month (tomorrow).
I did the same thing on the 4th of this month, I had until march 2023, but as soon as I generated the code, it moved forward to the 30th Nov, I was lucky as mine expired on the 24th.
It should really be made more clear that generating the code will advance the expiry date to the end of the current month.