Subcontractor Rights: They owe me for a client that didn't pay them

I'm a subcontractor in California, working for a company in Wisconsin. I recently resigned for several reasons, and have 2 questions.

1. Is there a specific amount of time that they have to send me my final payment? I'm assuming this would need to be within the Wisconsin laws.

2. They owe me for a client that didn't pay them, and are refusing to pay me for that. I understand that the "pay-if-paid" clause isn't valid in Wisconsin, and that was not in the contract. This was about 6 months ago and up until now I thought they were making collection efforts, but found out recently that they just dropped the issue. I had warned them about this client before starting work and was told to go ahead anyway. Is there a way to enforce this? And being that I'm in CA, if I have to do small claims court, could I "hire" someone to represent me in Wisconsin?

Any help greatly appreciated, thank you!

Sue them in small claims or other court if you have to; they need to pay immediately when you are done and they cannot use the excuse they did not get paid. You and they contracted between yourselves, not with the third party.

I am sure WLD lawyers could intervene and put great pressure on the deadbeats if it is needed...

Thank you. I will send them a request for payment email (I've already sent final invoices, last one dated 12/26) and if they don't respond, I would sooo appreciate any help. I know as an employee they have certain deadlines, but couldn't find any specifics for subcontractors. Should I just add to this post if I need your assistance? Because I would have to go to Wisconsin to file a small claims court suit, it would be an issue for me. Unless there's another way to handle that? Much appreciate your help!

Yes you can add here or email the lawyers at info@worldlawdirect.com; your post is on file --