Xonight E-commerce — Due to technical problem, wrong mobile has been received but the company is not taking it back and neither my money is being given

Address:	Flipcart
Website:	Consumer comolaints

I searched Oppo company's f21s pro 5g mobile on flipkart but on ordering it was changed to f21s pro 4g for technical purpose of flipkart or to confuse the customer.
I have requested to return my mobile through many calls and emails but I have been refused many times citing their wrong policies.
Gave me a lot of mental trouble.
My money should be returned from Flipkart and xonight e commerce company