Family Dollar

I clipped my coupons in the app before I went to the store at the check out I entered my phone number and when the cashier told me the total I asked if the coupons went through and first she was just talking to the other employee and she didn't even looked at the receipt or anything she said well if you entered your number they should be there and I said yes I did entered my number but they didn't went through and she said then you didn't punched enter and I said I did and she was all rude like if I was retarded I'm Hispanic and she started to do like sign lenguaje and I've told her I do understand You perfectly all
I'm asking it's the coupons didn't went trough and she said even more rude and louder in front of the rest of the people well maybe you didn't even clipped so you know how to use a phone an app and I said look I do and showed her the clipped coupons and then she said well then I don't know and I said can you return the items and re ran the transaction and she said look if you don't know how to use your phone it's not my problem you don't know how to clip coupons if isn't there then you don't have coupons and I said look the coupons are clipped I'm not stupid and she got more louder and said I don't understand you what do you want and I said an I speak with your manager and she said I'm the manager and I said you know what you don't need to be this rude I'll just gonna call customer service about this and she said go hunny go I'm
So scared and laughed