Toothsi — Refund for aligners

I was took service from Toothsi.During video call with their dentist I was done payment throught Bajaj later gone through reviews about toothsi I was requested them to cancel the order in the initial process before simulation video and return back money to Bajaj Finserv.But they are not at all responding my mails, messages and calls.Kindly help me to get refund.