I had chickenpox 2 months ago, the scars of blisters are not yet vanished from skin. as my doctor said it will vanish with time. any solution for face?

No: Unfortunately, no solution to be offered now. I would definitely wait until all the blisters heal and then another 6 months as skin remodeling takes approximately that long. After that time, depending on the damage done you can get back with us.

Sunscreen: Can take up to a full year for scars to completely heal. The most important thing for you to do in the meantime is sun protection, specifically for those areas where you have scars.