Loss of brake pedal: This condition is usually a result of brake fluid leakage due to failure of a brake hose or a rusted metal brake line, a worn wheel cylinder or brake caliper, or a worn master cylinder. A simple once over of the system will reveal what's going on.
If you have questions about a specific purchase, it would be best to speak to an attorney who could inform you of your legal options. While there are laws that allow for a 3-day right to cancel certain purchases, these laws are very specific and do not apply in a majority of consumer purchases.
You are also entitled to cancel a contract for future services if you can no longer physically receive the services, or the services are no longer available as originally offered. Likewise, if you purchase goods or services during the course of a home solicitation sale, you maintain a three-day right to cancel.