I have a family share music but it doesn’t work for me

My husband apple id address is in australia, and mine is in us, i think this is the problem

as i live in Australia, i tried many times to change my location and address but because of my payment which has got 100 $ in it, it would not, i cannot also buy anything or redeem it!! Once i went to Apple Store and they could not do anything as well and this in disappointing fir apple