Sri Chaitanya Techno School — Forcing to buy books from their school only - else No EXAM

Address:

Hyderabad

My children are primary kids, I have already paid the full fees. Now the school management is forcing us to buy the books from the same school, that too for the price they have fixed (Very Costly Fixed Price). If we won't buy the books, they are not allowing the kids to write exams in Rank Guru App.

Why they have linked Books with Exams, We can accept if it is linked with School Fees and Exams.

What if I want to buy the books outside the school?
What if I want to use few books of my elder child to the younger one? so that I can save some money.
What if i want to buy note books outside the school? which are available for a better price than the school.

This is kind of getting fixed money during this pandemic period.
Please look into this and kindly do needful