well after firmly not accepting their $60 credit, they are now prepared to do an exchange, and i only need send the body section back, not the whole limbs and weapons. they sent me a return label so its all free. They suggested sending it in a smaller box but there's no way i can risk that because the original box has the perfect moulds in the styrofoam packaging to protect it. They just didn't want to pay postage for the huge box.
I will be asking them to take a picture of the replacement body before they send it to prove to me it's complete and not damaged before transit, as i dont trust them they will probably try to send me a damaged body and claim it was damaged in transit which they keep reiterating to me that if that happens then they wont cover it.