marco tires no integrity flat out ripped me off intentionaly san bernardino, California

i been going to marco tires for years when i am short on cash and i really need to get a tire. In fact i went there three weeks ago and purshased a used tire. The last few times i have been there i delt with a young man who always set me up with a good used tire put it on quickly and gave me a good price.. never had a problem. However i went there 9/29 to get a used tire for $30. An older man assisted me telling he would give me a new tire for $45. I got the tire and he had one of his guys put it on,who also kept telling me what a great NEW tire i got. I paid $50 why the price went up in 20min i dont know? The next morning went to drive off and tire flat. I pulled the tire off and what do i find at least 2 plugs in the tire that were obviously put in the day i bought the "new" tire. Not only is it plugged but they did a bad job doing it and more than likely the tire had some unrepareable damage and wont hold air. Cant take tire back there is no way they would make this right that would be admitting to being liars and thieves. The sad thing is they say there a familly buisnesss so it looks like the old man is just teaching the next generation that integrety does not matter and its perfectly fine to lie cheat and steal from your customers. People like them give small familly buisness a bad name!