No customer service

I took out a loan, paid in full with no problems, they offered me another loan and when I want to apply, al of a sudden I do not qualify. How can this be possible. Never skipped a payment. They give you a loan to make money on the xtras because they need a increase and bonus. I'm sure someone else will help me. They're good only once then you're the bad one. Why offer loans then. Close your business if this is how you operate.