Gary.......if you have contracts for the 2 previous jobs......take them to the Administrator and show them what was contracted they are liable for those charges. The jobs she cancelled in the future depends on what cancellations clauses you have in your contract regarding how far in advance a client can cancel without being responsible for them eg: 60 days /90 days /120 days in advance etc.
Add that to what Dave said above & let us know how you make out.