Byju's — Refund is not done by BYJU's

I am AYUSH VERMA, i was joined the couse of 12+jee, the mentor told us that if you don't want continue with course then fees will be refunded within 15 days of joining.
I claimed for refund the course fees within 15 days, but till now they are just giving excuses about refund,
i want refund, plz check where is this process? and all details about this.
Registration on[protected] and full course fees paid on[protected], process done by mentor Sakshi Mourya.
registered mobile no. [protected]
student name- AYUSH VERMA