Onshopdeals.com — payment done online, product not received

I had also ordered BT I didn't receive the product

On 3Jan 2020, I purchased wall paper from Onshopdeals.com. They promised to make the delivery within a week. Post one week, I followed up and they said it will be delivered within 4-5weeks. On 28th Jan 2020, when I followed up, they said, due to Chinese NewYear, the shipment got delayed. Post that they stopped responding. Post continuous follow-up, in Dec 2020, I was asked to share bank details to refund the money. In Jan 2021, they said the amount will be refunded within a week. In Feb 2021, they said within 24 hours I will receive refund. Post that no response from them. Today it's 5th March 2021 and I am yet to receive money from them.