Car Struggles

I really do not like it when you go into a shop to get your car fixed and they try in every way take advantage of you. I can’t tell you the pain I have had with my car the last week. They found out that I needed a battery and the dealer was going to have me pay $200 dollars making me believe that it was the only way they could fix my car. I went in today and realized they did not need to put a $200 dollar battery in and that when I get it out I can go and get a $100 cheaper battery with the same warranty as they can offer. Now I am having troubles with the extended warranty that I had paid a pretty penny to buy. They need or want proof that I have been maintaining my car with regular oil changes and such. The last oil change that I have on record is 6 months ago. I have had it changed since than however I had someone else do it for me. I like synthetic oil and so I like to go and buy the oil and oil filter and have someone else change the oil for me and this last time is what I did. Now they are giving me a hard time about it. The problem is they do not want to pay for the repairs. What really gets me is they can look at the car and see that I am very good at maintaining my car. They just want to make it as difficult as possible for me so that they do not have to pay for the repairs. It is hard when people and companies try to take advantage of good people.  I guess tomorrow I am going to write a claimer that I have had the oil fixed and that it was done by a friend of mine, what more can I do? I will not allow them to take advantage. I guess I would never even think of taking advantage of another person.