Walmart Walmart Automotive Unethical and Costly Winona, Internet

I took my vehicle to Walmart for a routine oil change. Went back to pick it up an hour later, paid for the service and was advised to have a nice day and away I went. 

About 2 weeks later my oil light began to flicker (which had never ever happened before) and everytime I would turn right the oil light would come on and the engine alert would sound. Obviously concerned I went to the gas station and checked the oil, it was completely dry! Realizing that there's no way this should be the case I added oil to see what was going on, sure enough every drop ran right back onto the ground, again, none of this had ever happened and Walmart was the last one to touch my vehicle!

I took my vehicle back to Walmart to find out what had happened and they advised the problem was beyond what they could fix, and that when I brought my vehicle in just 2 weeks before I had apparently already had an oil leak that I was never informed about. Needless to say after a nice long discussion with the manager (who by the way agreed that I should have been verbally advised of a problem), I advised I would be taking my vehicle in for repair and bringing them back the bill. The manager (Andy) advised that if it was their fault they would do the right thing and pay for the damage.

Long story short I ended up needing to have an entire rear panel and valve replacement done to the tune of $650. When I brought the bill back to Walmart they advised the amount was more than what they can give and that I would need to take it to corporate. Well, big surprise, I took it to corporate and the Insurance people for Walmart advised that I should have read the purchase order and they didn't have to verbally tell me anything. (Mind you the "oil leak" was written in fine print, waaaayyy at the bottom in abbreviations!) 

I told them that is a completely unethical thing to do, if someone brings in their vehicle specifically for an oil change, and there is an oil leak, the customer should be informed! They basically told me it's too bad for me and I am going to have to swallow the bill. 

I am very disappointed that  a company would actually treat their customers this way. I visited Walmart at least 4 times a month and spend on average about $500 there and this is my thanks? 

I will never and I mean never take my vehicle back there. I can only count my lucky stars that nothing serious happened while I was driving, I am 9 months pregnant and this vehicle is my only mode of transportation. Shame on you Walmart!!!!