The more missed repayments you have, the worse your credit rating. And the less likely you are to be offered credit.
If you've missed a repayment in the past, your credit provider will record this and report it to the credit reference agencies.
Next time you want to borrow money from another provider they'll run a credit check. The provider will see that you’ve missed a repayment. And it will use that information to decide how likely you are to make your future repayments.