Bad Customer Service at Audi Northcliff

I was in the 1st option to purchase the vehicle, and it took a while for the bank to approve on finance. Rene, the salesperson who was helping me ignored me and sold the car to another buyer without even telling me. And funny enough, I am still busy preparing each and every document their finance manager wanted. She did not even bother informing me, there is not even an apology after this happen.