score:3
The answer is to go to VFS office with your pasport, a cover letter stating that the visa needs to be corrected, sharing additional details or any details which prove why the visa given was wrong and what correction is required.
Make sure that the correction you need is spelled out both in letters and numbers (if its dates) .
Make sure to use BOLD and LARGE letters to emphasize the changes you want.
VFS doesn't charge you for this service and is inclusive of the charges you had already paid before.