Advice for fluid swelling treatment following knee roll liposuction?

I had a tummy tuck and liposuction on my inner knees 8 weeks ago. One of my knees swelled up on day 5 post op and since then has not gone down since. I have been in compression garments 24/7 since day 3 post op. Coban 2 compression bandaging did make it go down quite a bit but the fluid re accumulated. My surgeon won't aspirate and keeps telling me it will be absorbed by my body and that compression is all that is required. My skin changes colour and bruises are still appearing. Help? Advice pls