Rasist

I was at KFC Hercules to buy my grandson mash... I rorderd the large mash without gravy and when I got my order the mash was the same size as the small mash and gravy... I then asked to talk to the manager and I asked him why is the large mash the same as the regular mash and he told me that it's correct.. I asked his he must show me a small mash and he came with a small holder with mabey a teas**** with mash in... When I asked him this is not right he told me I'm ****ing him off and walked away and when I called him him again he told me to **** off bacause I'm white