Disgust at customer service

So im trying to borrow money from wonga, and i have paid up my loan from wonga, i tried to apply again, because i have a excellent trust rating, i tried to apply and got rejected for some reason. I have always paid, never missed a payment, always borrowed between 4 and R8000 over 6 months, just finished paying off a loan last month but im in a jam again, and all of a sudden, I cannot even borrow R3000. I was told by an agent when I called that I tried to borrow R8000, and I was declined, or rejected, and maybe should try applying for less, which I did, and still can't get a loan from them.Also no reply when sending them an email, i had to call in to find out why my applications are rejected.That disgusts me as a good paying customer.