Byju's — Regarding cancellation of registration / subscription with Byju's

Address: Singrauli

I am taken educational subscription by off line with byju's employee name Gyanendra Tripathi on dated 28.08.2022 with registration fee amount Rs. 5000.00 and balance amount 68000.00 processed through loan.
He told me if you are not like my subscription within 15 days you can cancel and refund your amount.

I am mailed to byju's website ([protected]@byjus.com) for cancellation of registration / subscription on 03.09.2022. but no response after daily followup.
I am also filed complained on byju's complaint section and generated Request ID: 38272214 on dated 11.09.2022 still no responce.