Knee pain getting worse.

I was diagnosed with chondromalacia just over a year ago and the pain isn't getting any better.I have just been away and for a couple of days i was in so much pain i was nearly in tears with the agony.I have had mri scans before but even though my chondromalacia is grade 4 nothing is being done to treat it.My doctor wanted an arthroscopy done but the consultant didn't want to do it.The pain can go into my lower leg and it seems very achey most if the time.Stairs are nightmare and if i bend my knee it is painful.I amgetting to the end of my tether and i don't know what to do.