Flipkart — No processing return request after accepting return request

I have ordered a 2 piece of calvin klein tshirt and a tommy hilfiger tshirt on 1st july 2022 and it got delivered on 3rd july.I raised a return request because of size issue.Now they accepted the return but not processing the pickup i tried calling them several times and they are giving a date for the resolution but it got past.Now my consent is it has a 10 days return policy but if they are not picking up the product within the 10days i cannot able to return it and its a utter waste of money.
Immediately solve this issue