Your package may have been sent back to us because the courier was unable to reach you, or there was an error with the shipping address you have provided. In that case, please contact the shipping company or local post office to find the parcel first, as the parcel may stay in there even the shipping info shows been returned.
Meanwhile, don't worry, if the parcel has been returned to us due to some reasons, once we get them, we will inform you via email and issue the refund you soon.
You can also submit a ticket in your " My Tickets" to contact MMC Customer Service for further help, we will reply you in 24 hrs. We believe we will offer you an appropriate solution for that.