In reply to Paul Troon:
I had a bad ankle for many years. What I found helped was tape, applied for support to help it recover, then for proprioception.
Secondly exercise, to strengthen the joint and re-train it. Wobble boards are good, but can be too much at first. Initially, try standing on your bad leg and swinging your good one around to shift your balance rapidly. Repeat on your good leg for comparison. If you have the strength, then you need to re-train the nerves to make everything work properly.
How are your hips and knees? Sometimes a problem at one end of your leg affects the other end.
YMMV, but I found glucosamine to help. Ultimately, healing takes more time than you think it should.
If things are really bad, get a sports Physio. They cost, but I swear by mine.