Did they assign you a vin? And also say on your Tesla Account does it say status of " Prepare for Delivery"?
If you have a VIN assigned to you, it needs to make its way to your nearest Delivery/ Service Center, once it gets there I think it will generate a text to you to prepare you for final payment/ last steps. After that, in the text it will provide a link for you to schedule your delivery date.
I got all of that but when I went to the link on my delivery text, all of the calendar appointments were grayed out. I ended up calling them and that's where they can manually set up your appointment