Hi Mayank.
If you spoke to somebody in Student Services about the discount, you can just give us a call back and we will help you register for the GSS Prep Plus package using your discount. In order to use it on a GSS Prep Plus instead of a class, you have to do so over the phone.
In terms of upgrading, you are absolutely correct. If you choose to upgrade from a GSS Prep Plus to a Live Online class (or an in-person class) we will only charge you the difference, so that will always be an option for you.
If you have any other questions, please feel free to give us a call at 800-576-4628 or send us an email at
studentservices@manhattangmat.comBest Wishes,
Caitlin Clay
Student Services Associate
Manhattan GMAT