Never bought a car before and now it feels like I am being scammed.

TLDR: Dealer said car was ready for pickup and a week later wants me to resubmit all paperwork and get another loan with different bank. Original bank says the already sent money to dealer. Not sure how to proceed.

Also cross posted this in askcarsales

I am buying a new Cadillac remotely from a Cadillac dealer. I was told I could not electronically sign the documents so paperwork was FedExed to me and I promptly sent it back. I was told a week from yesterday that everything was done and car was free for pickup.

Life was busy and I had issues arranging transport. I finally got transport arranged yesterday morning and texted the dealer a heads up of who would be picking up the vehicle.

I get a phone call from the dealer last night saying that they actually cannot give me the loan that I signed and I need to re-do ALL of the paperwork and get another loan with a different bank. They said because it is an electric vehicle that qualifies for the EV rebate GM Financial will not give me the original rate I was promised.

I call GM financial and they tell me my rate is still in fact what I was originally promised AND my first payment is due in 28 days. I am still on the hook for this first loan. Also, somehow this time around I am able to magically submit all the dealer paperwork via email, but previously I was told no paperwork could be accepted electronically.

I am not signing or agreeing to anything else. I need to figure out what is going on. Did someone mess up somewhere or is this a fraud? I can provide more info if needed, I have never purchased a vehicle and have no idea what is considered normal, but this seems sketchy to me.