[gooddaysir]

I'll assume you already did step 0 that Patio11 described, and they haven't paid you and aren't returning your calls.

I've been down this road so I completely empathize with you. I can also say that I have always been paid in the end. My advice is good.

Go to the employer (where the office is) and ask for payment in full. You need to be extremely clear. Do not say please or thank you. Look them square in the eye. Channel Clint Eastwood if it helps.

Do not call in advance. Wait in the lobby if the person who hands you the cheque isn't there or in a meeting. If the secretary says he/she won't be back until Tuesday, return on Tuesday and again demand payment in full.

Be firm and respectful but not polite. If they continue to evade you, call and email them stating that if you are not paid in 24 hours (no longer) that "x" will happen. You decide what "x" is. Usually I promise to report them to the Better Business Bureau and/or take down their website if its on my server. Stuff like that. Never, promise something you won't go through with.

The last step is small claims court. Hopefully it doesn't get to that. I suggest you do this yourself and not consult a lawyer until you really need one.