Hello, dready31. We're sorry for this hassle. We'd like to look into this for you. Did you make sure the Shipping Address matched not only the Billing Address of the credit card being used, but must also the Address on the Account? If all 3 addresses do not match, the order will be cancelled.
To update the shipping address on your account, sign in to My account at https://www.boostmobile.com/ with your phone number and pin code.
If you have any other question or concern, feel free to reply.