Byju's — Asking cancellation but they didn't response

I am trying to talk to costumer care of Byjus for cancellation but after picking up the call when the hear about cancellation, they said will call but afterwards nobody responds this is happening to me. So many times I informed and still not attend any classes. Already I said I'm jobless so I can't pay but last month I paid the emi for afraid to spam calls. Now should I do my work or keep on phone all the day for their response even for my own hard earned money also I sent many mails to them but nobody bothered to respond the mail or show any curtesy to reply even I kept in cc Mr.Byju himself but very sorry to see such kind of shameful behaviour of a so called big company, now if I don’t get any positive response from Byjus within 1-2 days regarding my cancellation and refund and the loan I will be left with no option but legal action I will complaint consumer.