Byju's — Complaint about refund

I was offered by byjus 14days free trial classes with a refundable fee of Rs.7000.
byjus employee said that you can cancel and get refund anytime u want and i paid Rs.7000 in 4 parts because more then 2000 was not allowed through phonepe app. now i am asking for refund from 2 months i called more then 100 times but did not got any refund yet. details are mentioned below and receipt are attached for your reference.

Student Name Adarsh Manyawani
father name Vijay Manyawani
mo [protected]

kindly resolve my issue as soon as possible.