Call/Email PrimeAbGb and take their Contact Details, do not forget to take NAME of store manager or person with whom you talk or is in pool while you managing all.
Provide correct/accurate details to Courier Company, so they force to hand over to same person with whom you are in talk/contact and than only all of your RMA process will go smoothly.
Never do such tricks, if anything goes wrong, then the sender who booked parcel will be in big trouble and may be not bale to claim anything.