Family Dollar review: unethical behavior/did not honor clipped coupon

I asked Assistant manager for Rep number because she said she couldn’t give me her name. She asked what I wanted it for and I said because I was going to write a complaint to the General Manager on the website just as she suggested I do and that was when she hung up. As if the rude treatment wasn’t enough at the store, she had the audacity to hang up on a customer. My question is, what qualifications does an Assistant store manager need to have in order to work for family Dollar because it seems the bar seems quite low. I have been shopping happily at this Dollar Store since it first opened and have used clipped $5 when you spend $25 a million times and never had this happened. It’s the ONLY Family Dollar I shop at, unfortunately, it will be the last. A company that can’t honor a coupon that is theirs and has no qualms in losing a customer over $5 obviously does not need my business. I will tell everyone I know of the horrid treatment Family Dollar gives their customers so all those I know and love will not have to be treated with the disrespect I was treated. And word of advice, It would be great if you guys hired people that were actually fluent in english and understood the language well, especially if they are going to be in a position of authority.