I understand. Have you looked into speaking with a civil attorney about filing a law suit in small claims court to recover lost wages? You have a strong case for filing a law suit as you can use evidence that the lack of training of the instructor and other personnel you were working with, was in direct violation of the terms of the contract. The courts do not look lightly on breach of contracts cases, and they are quick to enforce remedies if one party is in breach of their obligations, in this case CR ENGLAND.
You can also present evidence that this resulted in lost wages for you, and that will also help your case in a civil suit as well. I would recommend hiring a lawyer to help you in this process. Sometimes civil lawyers will agree to work on a "contingent fee"-- which means that you won't have to pay anything up front, and they will instead take a portion of the amount you recover in the lawsuit. While it does mean they'll get some of the money you're awarded, it also means that you don't have to put out any more money for an attorney, which may be especially beneficial since you've already suffered lost wages.
On another note, I also recommend getting your record expunged-- that way the Leaving the Scene charge will be removed from your record when you apply to jobs in the future. Here's a reliable link that can provide you some more information about record expungement:
I hope that helps! Please let me know if you have any other questions. Also, please take a moment to rate me using the stars as this is the only way experts are compensated for our time here on 'just answer'. It doesn't cost you anything to rate me, and we can still continue our conversation for free after. Thanks!