Lulu And Sky — didn't get my refund

Address:	Garia , 48/1 milanpara , south winds apartment, Kolkata, West Bengal, 700084
Website:	Lulu and sky

I've purchased a pair of heels and they delivered it on october 1st but it was not fitting well so my return picked up at 3rd october, after that i've called them so many times but they didn't gave the refund, the quality check was done but still every day they are telling me it will be refunded after 24hrs but it's been 12 days and i still didn't get my refund. Please help me out here. It's a fraud app