Removing a ban issued due to TB scars while they do not exist

Dear sir/madam,

I have applied for a maid visa for my maid 1.5 years ago and it got rejected mentioning that she has scars on her lungs and she will be banned.

Then we got her checked in India and all the doctors mentioned that she is not having TB; neither active nor sleeping.

Please let me know if it is possible to get her ban removed and how much will it cost?