Unable to give straigth answer

This was the first time i took a loan with CAPFIN. I made a 6 month loan and paid every month. There was one month i made i late payment due to receiving my salary late, but i did not mis one month ( not pay one month). When i finished paying my loan and wanted to take out another loan, they say i do no qualify due to my payment history. When i ask them to elaborate no want will assist me. I hobestly do not understand, how do they say my payment are "inconsistent" if i paid each and everymonth. No one can explain to me what the problem is, they just keep saying computer generated, and can not give me a propor human explanation