Feb 5, 2017 09:37:56 AM by John S
Feb 5, 2017 10:43:56 AM by Kathy T
It's hard to answer you as I hear only one part of the story/problem.
My best advice to you is to negotiate some sort of financial arrangement that is agreeable to both of you. Maybe payment of part of the money for the work you Did do, whether you correctly fulfilled your part of the contract or not. You should have also communicated with the client and sent partial samples of the work you were doing and the problems you were having before you finished the entire job. And the client, should have stopped the contact at the point where they thought that you weren't skilled enough instead of letting the job go to the very end.