Think and Learning pvt ltd Byju s - I requested for cancellation of byju s tablet course and refund my money but they are not responding

On **st march ****, * sms came on no.saying that * loan account are there from byju's and money of **** and **** will be debit on */*/**.
From **/*/** to **/*/** I called byju's customer care more that **times and wasted my more than **hours and totally mentally harrased and I whatsapped byju's counselor as well but he said "byju fraud company h koi help nhi krega"
Customer care is only putting my call on hold and they blocked my registered mobile number.
Nobody is helping in canceling the course only they are charging me with emi par emi.