I have studied your case.
Prognosis is poor in your case now.
But vigorous physiotherapy
with yoga and if require further manipulation under anaesthesia may help.
MRI /CT scan
will help in confirming intra/extra articular stiffness
I will advise to consult orthopaedic surgeon
to assess for associated injury.
I can help you more if you can send/attach report of your knee x-ray.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.