Shiksha — Getting calls

I recently made an account on shiksha.com and my personal number got circulated by them to various places. The number was asked for otp purpose. I keep receiving calls from them regarding masters courses. I need them to stop because i've already taken admission else where for the same. There is no way online to deactivate my account on the actual website. So please deactivate my account [protected]@gmail.com and stop all the calls.