Called to get an oil change, they had several issu...

Called to get an oil change, they had several issues just getting my information. I asked for Valvoline oil. They didn't know if they could do that or the price. They would have to call another place and call me back. Rodney calls me back and explains the normal oil change is $50 but for them to use Valvoline it is $90 at least. I asked why $40 mark up. He has to order by quart and pay the mechanics. I tried to explain there should be no reason its $7 EXTRA PER QUART to pour another type of oil in the car. He would not let me talk, kept talking over me telling me he is running a business and a retail establishment. Every time i would talk he would talk over me saying ma'am you don't understand. I understand perfectly. You are NOT looking out for the customer and are very rude! Ripping people off! I finally hung up the phone because I couldn't get more than 2 words out.