Slightly racial

Truworths White River, a slight racial incident occurred where I needed to exchange a top bought the day before. I brought in the top with my slip showing my account details and my purchased items. They did not want to exchange the top as I didnt have my Id with me. The counter sales asked if I stayed far???... I can not see what this has anything to do with them assisting me of where I reside. Only after I walked out the store did the manager walk behind me to say he will assist me. I will rather try Nelspruit perhaps they will be more of assistance in exchanging the top for me. I can still for the life of me not think why they would not assist me and ask a question such as "Do you stay far?" and once I walked out the store the manager then only wanted to assist me.