All you can find out is if the damaged brake line was underneath the chassis and could have possibly been exposed to road damage.
If the broken line is in the engine compartment then that would be strange.
Obviously something broke. After market wider wheels could possibly damage lines in the wheel well. Poor accident repair from a previous prang.
Try to get the repair order codes explained so we can all know how much you paid for individual parts an labor.
Was there a towing fee involved in tis charge?