Have they explicitly said no? Ask them nicely, explain why you want them to.
If they refuse, ask another family member or a friend with a car.
Still no one, if they will come and visit sometime soon, ask them to bring your luggage then, and pack less and take a sleeping bag until they come.
If no one is going to visit, you have to either ship/post your luggage or buy new things locally, or make another trip back.