Flipkart — Neither product received nor refund since 6 months

I ordered a product(t-shirt) on 22 Jan 2022 at Flipkart. The product showed to be shipped but I never received the same. I complained several time for the same and everytime they told to wait for next 15 days for the issue to get resolved. I waited for the product but it never reached me. Finally I decided to cancel and requested for cancellation on 12 June, but Refund is not yet issued . I again complained for the same 15 days ago but I haven't received my refund yet. Flipkart is acting like fraud. Please help.