Knee operation problems

Hello I got my left knee dislocated in a basketball game some years ago. The physiotherapy exercises was not successful in stabilizing the unstable kneecap, so they recommended me to do an operation, to which I against better knowledge agreed to. This was when i was 17 so i didn't know a whole lot of physical exercise methods. The operation moved the patella tendon's attachment lower for the purpose of stretching it. I had the operation, recovered and now my knee is in pretty good shape, however recently a problem has arise. Firstly, since i started to do a lot more serious physical exercise i have learned that the physiotherapy i received was more or less worthless in terms of stabilizing the patella. In fact, the training i'm doing now is so effective that the patella tendon apparently has stretched so that i now have a feeling that it's being pulled in the other direction, medially. So now the knee feels unstable but not because of a loose patellatendon, but because of a stretched one and a faulty placed attachment. Or atleast that what's my theory is. So, anyone attentive might reach the conclusion that maybe i would have been better of if i never did the operation, and instead did my own physical training. I agree with that fact. However, that is not what my question is about, i would like to know what i can do now. An idea i had was to call the doctor who did the operation and ask him if he could move the patella tendon's attachment back to it's original position. That might solve the problem, however i'm not willing to take any risk at it, it is in fact an operation with months and months of recovery. So, what should i do about it? And, i'm not from an english speaking country, so don't get upset of grammatical errors. However my county is of the first world and have absolutely top class hospitals and doctors.