Mirraw Online Services — return is expired

I have ordered a product on 21sep 2017, and i got the product on 26 sep 2017 and due to some reason i have requested for the return of the product on 1st oct 2017.. Then i got a message that "please fill tracking details for highlighted orders once you ship the products."
No one has come for the reverse pick-up and now i can see that my return request has been expired.
Why is this expired?? This is not my fault if no one came to collect the product.
Please process it asap and return it.