Strong Volkswagen

Car is great...... salesman and financing bring the "used car salesman stigma" to realization. Wanted to pay cash, but said the car would be more, so they recommend to go through their financing to get the better price, and then to make 8 payments then pay it off. They ended up saying we qualified to finance through AFCU (our credit union) and we could get a 6.99٪ rate, which they seemed like this was a great deal. Unbeknownst to me, this raised the car price up $600 because we had better credit and were able to get a lower rate. Then I looked at our financing of AFCU and saw that we were financing more than I anticipated. Called to see what the issue was, and they said to look at the contract that they put in the glove box. There was no contract and they kept saying there was. They realized their mistake and finally emailed me a copy. Noticed a $199 charge for nitrogen for the tires. Had no clue what this was, and never agreed, but somehow ended up in the contract I signed (my mistake since I didn't read through all the lines and trusted them). Another charge was $487 for eco guard (whatever that is) again, never noticed that. Who in their right mind would pay an extra $700 on a 2011 vehicle for added protection on paint or interior!?! Again my mistake for being a trusting person and not looking over a contract for hidden fees that are added.