To provide nothing to this thread, I have put a deposit down using my CC or Debit card. I made sure to inform them before signing anything that I did want my deposit back and for it to not go toward the deal. They have refunded me before I left the dealership, or shown it by receipt or purchase papers.
While OP's issue might be a little much for some to understand as its only a G toward an assumingly 55k+ truck, its the principle. I am bit different, I would not wait for my statement to come to notice that, I would ask for a receipt asap.
The title is an over reaction, I was expecting a story of a trash truck or a lost in transit truck or the sales guy being a complete nut etc.