I recently bought a Toyota Highlander from this de...

I recently bought a Toyota Highlander from this dealership and everything was ok until I set up online account and find out that the price , interest rate and term we agree on are a way different from what I signed. It s over by 15k and I have my documents and witness at the time when I bought the car. I ve been trying to figure out what s going on but no response from them until now. Even when I came in person they told me that no one available to see me and some one will call me to set up appointment but no one called, when I called again they told me to wait for 72 hours to have someone just to talk to me. I have to call the bank to solve the issue but they send me back to them. It s unbelievable that something like this can happen. Now I m paying 50k plus interest rate for Highlander LE plus can u believe that?
However the original deal was to remained balance after down payment 28k for 48 months interest rate 3.3