someone help can't download gift cars and gifted money I redeem but isn't added to my money

I have played forza since forza 2 and have bought the limited edition for 4 horizon and 5 but I get gift cars from car packs and for being VIP and I click on them and it says error cannot download please try again later and this has been happening since before Christmas I have 10 gift cars stacked and I can’t download any of them some one please help!!!