DECLINED STATUS - NO EXPLANATION

I app**** for a store account and got declined online. I called them to ask why, and they said something is missing with my application is missing and credit score? I explained I have good credit score and that I have other clothing accounts that are paid on time each month, they couldn't answer me. why do Foschini approved me, and Mr. Price but not Ackerman's. jeeez. poor service for not explaining it!!