Vijay Sales — Boat rockerz 510

I had ordered boat rockerz 510 headphones on 4th November, 2021 on vijaysales.com and paid the price which was there on their website that time. Their executive had said that I will get an update on November 9 that when I will be able to receive my product. On, November 9, 2021, I got call from their executive that now, the product is not available, so we will request the online team to avail it and call you to confirm it. But still, I didn't get any calls from their side.If they are not able to deliver the product, then, why the hell would they put them on their website for online purchase, extremely disappointed with their customer care service and I will never recommend buying anything from vijay sales to my closed ones whether online or offline, their customer service sucks.
If I don't get my product or refund of the payment I made within 3 days(i.e. till 13 November, 2021) I am gonna complain to the legal authorities about this issue.