LOW CREDIT SCORE????

I'm trying to take out a new contract because my previous one has ended and was on my parents.<br> <br> They keep telling me that my credit score is to low, but I've got multiple other accounts and a car financed to my name. I earn much more then what is required to take out a contract and i have never missed a payment on anything.<br> <br> How can I get financed R300000 for a car but I can't get a lousy R800 contract....<br> <br> Please sort this out because this is ****** ridiculous!!!