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.
At the Time of Sale. By law, the seller must tell you about your right to cancel at the time of sale. The seller also must give you two copies of a cancellation form (one to keep and one to send if you decide to cancel your purchase) and a copy of your contract or receipt.