In Florida, there is is a law known as the "cooling off rule." It pertains to contracting for services and goods. According to the the cooling off rule, if you contract for future services, you are entitled to a 3 day cooling off period. You may cancel the contract when you are no longer physically able to receive the services or the services are no longer available as originally offered.
You must notify the seller within 3 business days from the date of signing the contract. Notification does not have to be written although it is wise to do so. The seller must refund any money you paid within 20 days of notification.

If you contract for goods by home solicitation, (meaning the seller came to your home or the seller was somewhere other than their regular or permanent place of business), you have 3 day cancellation right so long as the contract was for more than $25.00. However, cancellation must be made in writing by midnight of the 3rd business day after signing the contract. Your refund must be sent within 10 days after cancellation of the contract.

As always, there are exceptions. If you are unsure of your consumer rights, you may contact an experienced West Palm Beach attorney or you may also contact the Florida Attorney General's office or Florida Department of Agriculture and Consumer Affairs