Byju's — cancellation and refund

Address:

E/601,Blue Mount Edifice, Suncity, Thane, Maharashtra, 401202

I had purchased the package on trail basis for 15 days and the concern person told that on dissatisfaction the product can be returned within 15 days. Its been more than 2 months there's no response from your side.
100's of calls and emails have been sent from my side but the authority is still yet to proceed the same. The emi's are been continuously deducted from my account.
Everytime new person attends me.
Never expected this kind of failing services from your end. This has lead to disappointment.
I request you to solve my problem asap orelse need to take some other route for the same