Why Is My Post Meal Blood Sugar Level Above 200 Despite Taking Vinsorin-M Apart From Managing Severe Foot-to-knee Pain?

Hello sir... My age is 34 years... I have been attacked by diabetis 1 year ago... After lunch my sugar levels are 220.. Now il using vinsorin-m Tablet since 4 months... But my sugar levels are not below 200.. Can u pls suggest me the best medicine ? There is very bad pain in my inner foot upto knees.. Kindly suggest me best medicine sir....