Unfortunately, a lot of PKRs fail early. I know that some surgeons who used to favour them have stopped doing them, because of that.
I was fortunate to have a PKR that lasted for eleven years before it had to be revised to a TKR. Even so, I wouldn't consider having a PKR for my second knee, but went straight to a TKR.
Initially, I was sold on the PKR, because my surgeon at that time told me it was more suitable for a younger person. Maybe that's what happened to you, too?
However, that's all water under the bridge and probably no comfort to you now.
Sometimes, I wish that hindsight could be foresight!
There are some surgeons who won't see another surgeon's patients until a year has elapsed since their surgery. That's another barrier you may come up against.
Don't give up, though. There has to be a solution for you somewhere.