Difficulty getting final paycheck from unethical boss- lost check -(yeah, right)?

I worked 3 years for a boss I knew to be hot-tempered & often unprincipled. I left--she promised to mail my check. Two weeks later I inquired and was told "Oh it was mailed the same day, let me investigate."

Finally she says she'll write another one, knowing that I wouldn't cash the first one if it showed up unexpectedly (and I certainly wouldn't) Since, I've shown up, emailed, gone again today only to learn that she HASN'T even written the replacement check and her guru friend/accountant says she should put a stop payment on the first check (costing $25) and deduct it from MY check....I hung up, and then I start thinking, "What the f...? WHY should I pay that $25? A friend says, that's the cost of doing business, it's HER decision to stop-payment--not a fee I should have to share. I think I should refuse the partial check but what's my next step? Her shadiness is more offensive than her trying to carve $25 out of a $190 paycheck. Any suggestions?