I paid my all items over than $169.27, I putted bills over $157, and putted a lot coins, and coins go thought but not show on screen I called one customer service, she doesn't know how to do it, and she called another customer service came here, and she canceled my payment. The screen show I paid nothing. Then she called her manager or boss, her manager or her boss taught her control merchine and showed I only paid $2. I asked her pull out camera, they don't want. They try to cheat my money.