Big O Tires

Very QUESTIONABLE business practices, sloppy service, and my car's air con is mysteriously broken after visiting. I am definitely not coming back.

I went in for an oil + air filter change, and requested they fill up my tires (tire pressure was very low, 26)

1) They didn't fill up my tires with air the first time I asked, I had to drive back a second time to remind them

2) They also forgot to reset the oil indicator back to 100% , it was stuck at 40%

3) The "receipt" I got was not a real receipt. It says in the top left corner "ESTIMATE REPRINT," and near the bottom signature area, "This Estimate cannot be used as a Proof of Purchase." (Picture is included.) I'm not sure if this is legal.

4) The next day, my car's air conditioning STOPPED WORKING. It was working before I brought it into the shop. (Coincidence??) The staff denied they had anything to do with it.

Just one mistake alone would not raise my eyebrows, as mistakes happen. But all these things added up into a very disturbing game of "find the error," with multiple visits after my first, to fix their mistakes.

It made me question their management and work experience, and I am worried I'll find something else broken in my car that was working just a few days ago.