If you are a victim in a bad deal then you need to be your advocate and change the terms. 

The first step is to have a few contractors come to give you an estimate for the work that is left to complete. Of course a detailed line item estimate. 

The second step is to assess the cost to complete against the cost paid to date. Most likely you will have grossly overpaid your current contractor. 

The third step is to speak with a few attorneys and research your options. 

Florida adopted House Bill  7125 governing claims of Contractor Fraud. Section 489.126 of the Florida Statutes covers the following:

• When a contractor receives an initial payment of at least 10 percent of the contract price for any repair, restoration, improvement, or construction job involving a residential property, the contractor is required to apply for any necessary permits within 30 days of receiving the payment, and to start the work within 90 days after all necessary permits have been issued.
• When a contractor fails to meet the deadlines, the client must send a written demand letter insisting the contractor either apply for the permits, start work, or refund the initial payment.+ If the contractor cannot meet these deadlines and refuses to refund the payment, the contractor must show “just cause” for the failure, unless the contractor and the client agree to an extension of time in writing; keep in mind, however, that failure to respond to the client’s demand letter within 30 days of receipt creates a legal inference that the contractor does not have “just cause”.“
• If the contractor receives total payments for a project “in excess of the value of the work performed,” the contractor may not refuse to complete the job within 90 days (or a different time period specified in the contract) or refund the excess money charged; if the client sends the contractor a written demand letter demanding completion or a refund, the contractor must reply within 30 days of receipt.

A contractor who violates the law is subject to criminal prosecution for theft. The degree of the offense–and the accompanying jail time–escalates depending on the total amount of money received:

• If the amount received was less than $1,000, the contractor can be charged with a first-degree misdemeanor;
• If the amount is between $1,000 and $19,999, the charge is a third-degree felony;
• If the amount is between $20,000 and $199,999, the charge is a second-degree felony;
• If the amount is $200,000 or greater, the charge is a first-degree felony.