Stretch Calves Get a custom made insole. Hams Stretching. Sports Taping. Hot Fomentation.

Consult an ortho surgeon for the same. 

Hello there...well Ankle pain is quit common..the only cause of worry is it is there since 5 months....any pain or discomfort felt for more than 3 months warrants attention.....in your case maybe the footwear is the culprit maybe not.... if you cannot  recall any trauma involving your left ankle even years ago then yes maybe footwear is the reason...but otherwise u can get x ray of your ankle done along with sr uric acid test just to be a bit sure....also do stair climbing and descending activities only if necessary....sometimes swelling in tendo Achillies may also make ankle pain worse.... do consult Musculoskeletal Physio/Orthopadician....and avoid self medication. Regards & take care.

Several reasons for your pain. I recommend you to get an X-ray done to make sure that you do not have a calcaneal spur . It is just Plantar fasciitis. one more thing that i ll suggest you is to make sure you don't wear a shoe which has (1) heels and (2) HARD INSOLE. If any of the case is there you may change to a running shoe which is comfortable and also absorbs the shock (Skechers GoWalk3 , Nike Free, Reebok twistform, etc..) or in case FORMAL shoe is a choice you may buy a size bigger and add a SILICON INSOLE which offers good padding on heel area. and If your pHysiotherapy only included hotpack and stretching you have missed a lot. i recommend you go to some better physio.

There are many reasons for it but for now you can change your footwear, wear footwear which has soft cushion inside, don't exert yourself, keep ankle in hot water bucket for 10 to 15 mins, mild calf stretching exercises.