Sorry to hear you are having trouble getting your tires that you already paid for.
I would call them up and demand a refund of the shipping cost. I bet they will do it if you raise enough stink. Better to refund that than to lose the sale altogether.
And, be smart, DO NOT ride that beast when it is not safe to. Find another way to work (carpool, taxi, friend, etc...). Being in an extended hospital stay has a way of making your life very difficult!
Stay safe, Bro and good luck on getting your tires.