Bajaj Finserv — Online purchase using bajaj site

Address:

https://www.bajajfinservmarkets.in/emi-store/mobiles-tablets.html?utm_source=cap&utm_medium=google&utm_campaign=sg_bfl_mkt&gclid=EAIaIQobChMIx9Or_uG77QIVEwByCh09DwUBEAAYASAAEgKtb_D_BwE

I bought an iphone 12 white using Bajaj site. Bajaj site says they will deliver the product in 24 hours. Now its more than a week from the time i placed the order. After following up multiple times with the seller, seller confirmed that they dont have iphone 12 in white color in mentioned internal storage. When i asked seller to cancel the order they say they dont have that option to cancel the order and they asked me to reach out to Bajaj and when i dropped email to Bajaj with req id SR45457595, customer supports says i have to deal directly with the seller. When there is no product with the seller, how can Bajaj sell it in its site and later wash its hands from responsibilities???