Poor customer service. Just bought a redbull and cashier didn't give me a receipt and i asked if she could exchange it for another drink of the same brand and she said no since we didn't have a receip

I put gas $40 and it stopped giving exactly at $38.35. Then today same I paid $40 and it stopped at $38.15. They supposedly they slow the pressure and some stations they'll stop like .40 cents before