You should try to settle the price at scene. Apperently, you have miss this opportunity.
After the accident (usually within a month), notified your insurance company (or agent) for such accident by filling in some forms. If you did not duly notifiied them, your insurance co. could claim no responsibility or whatsoever, i.e. refuse to settle the payment with the other driver.
Assume that you have reported to Insurance, check your insurance how to forward the claim from for the 30 thousand (and by God, 30 thousand to fix a vehicle?? A Humvee??). Please note that if you claim the amount, you will lost all your NCB (no claim bonus) plus you have to pay for the premium. The premium depends on your deal with the insurance, i.e. young age driver, non-vehicle owner driver, inexperience driver, ... Usually, the premium is $3,000 - $5,000.