Change Shipping Address for an Order

I am trying to order a phone and new line through Xfinity Mobile, but the shipping address keeps being forced to be the same as my billing/service address. Everywhere I look it seems I can't change it "for my own safety." But my apartment uses the Fetch delivery service and does not accept direct deliveries. Is there any way to change the delivery address for this order to use Fetch's address instead? Xfinity doesn't seem to offer in-store pickup either.