WTF!

Last night I got my GM to give me my paycheck early so I would not have to stop at the hotel first. So I open the check and see that I got 40 hours regular time and .28 OT. Only problem is I worked 1.15 hours OT last week. It was really busy and I never got out on time all week. Now I know that is what my punch clock said because I have a print out of it. My AGM changed my punch, this happens all the time. The corp offive doesn't like to pay overtime. I am going to my GM today though because dammit I want the 45 minutes back that she stole from me. Isn't it illegal to alter someones time clock punches? What recourse do I have if the don't pay me? What should I say to the GM when I bring it up? Any advice is welcome.

BTW please stop by and say hi to my new renter Fidget over at Finding yourself Despite yourself. As you will see if you scroll down she is really into nudie pics LOL just kidding. Be sure to tell her I sent you over.