Flipkart — I have received a laptop with software issue but till now not received any support from flipkart side neither i got any replacement product also

Address:	Kolkata, West Bengal, 700008
Website:	flipkart.com

Customer name:binoy hazra. Registered mobile no*9168
Order id: od[protected]
Replacement (Return id:[protected]
Replacement (Return id:[protected]
Replacement (Return id:[protected]

I have received a software manufacturing defect laptop from flipkart. Seller vci.
The laptop has a default os as ubuntu.
Dell inspiron[protected]tb2bu core i5 - (4 gb/1 tb hdd/ubuntu/2 gb graphics) notebook
The model must support up gradation to window. But this particular laptop is not supporting any up gradation to window.
I have installed all the related drivers and related bios. But none of it is effective. Presently due to bios upgradation for window the laptop got crashed and i cannot even switch on the laptop.
I am continuously contacting with flipkart services. They are simply calling on request and asking for the issues. They are even making fake promises to send dell support executive on spot to resolve the issue. But none of the actions are effective.In last 8 days from the date of delivery neither i got any support from flipkart nor any trouble shoot help. The seller is not returning the product also. My 40, 000 is a total waste.
Looking forward to get some help from flipkart side.