Dollar Tree review: unethical behavior

Customer service is not what it use to be...I'm a customer and this was my second time going to this dollar tree on my side town. I usually go to the one on Northgate. I was at the check out counter when Chris said I could only use 4 of my 5 coupon which had no limit. He said it was store policy to only use 4 at a time. I told him the other dollar tree stores let me use them and his response was, "That's them-if you don't like it, Go there if you want to use them!" After telling him he was rude for making that comment. I asked to speak to the manager and he said to call customer service, I asked him AGAIN for the store manager and he said HE was the manager! then he started arguing with me and raising his voice at me like I was a dirty dog in front of the customers, employees and even the delivery man. I told him to forget it, I'll go somewhere else to shop and he said, YOU DO THAT!. Anytime an employee is allowed to treat customers badly, they don't have to worry about seeing me again! I did try to make a formal complaint by calling the corporate office. They had me on hold so long...They never did pick up the phone.