For the more serious problems you need to react in order to get things fixed. If something goes wrong, e.g. with your flight bookings, adventure tour, hostel/hostel booking or car rental, then you must react immediately to claim the missing product or service. Please contact the most obvious person in relation to your problem. This could be your KILROY travel agent, the tour operator or car rental company etc.
In any case, if you leave the matter for too long or until you get home, you may not be eligible for reimbursement or other compensation. Always try to document as much as possible and make clear written reports with facts which will make handling easier and faster. Most problems can be solved while traveling, while other cases such as disputes have to be settled upon returning to your home.