Flipkart — Pre order Scam

Flipkart asked to pay Rs 2000 advance as pre-order pass to participate in special sale of Nothing Phone 1. So according I paid Rs 2000 on 30th June 2022.
When I successfully ordered the said phone on 27th July 2022 paying full amount, Flipkart cancelled the order on 30th July 2022 without giving proper reason. When I asked for the cancellation on their twitter account, they said due to unforeseen issues faced by the seller the order was cancelled.
They finally refunded the whole amount of pre order pass and of phone.
They just took Rs 2k in the name of pre-order pass and holded it for a month and even on successful order placement and full payment of order, they cancelled the order.