Family Dollar review: coupon/employees

I just went to one of your family dollar store # 6282 around 8:30pm mountain time.I was trying to purchase two of the Clairol hair color by using your family dollar coupon which is $1 off when you purchase 2. I also had two manufacture coupons which they were $2 off one Clairol color box. The cashier Helen right away was a little rude, she said I can't use these, we are not giving things away for free. I said they are not going to be free iam going to pay. The other employee step in and said I cant use both coupon it has to be only one, one manufature or family dollar coupon, they dont double she said. Well by going through this i didnt end up purchasing these products. I felt bad the way they were talking to me, i didnt want to fight it, so i just left. I read in your coupon policy that you can Only use ONE Manufacturer coupon and ONE Family Dollar coupon can be used per ITEM in a transaction.Duplicate coupons in one transaction are accepted as long as there is an item purchaed for each coupon. Am I understanding your policy incorrectly? If not, can you please help this family dollar store (Store#6282 7260 W 3500 South Magna, UT [protected])
understand their policy a little more. So we that are trying to save a little money dont make us feel bad for using coupons. thank you so much