Did I get scammed for my reentry permit at the airport in Thailand?

Did I just get scammed at the airport by immigration?

Got a reentry permit for me, my wife and child. Few weeks ago I paid 1,000 fee each and that was it. Today the lady asked me for 1,200. I asked why? She said service charge to copy passport and because I didn't bring the filled out application downloaded from the Internet.

So I asked for a receipt. The receipt shows 1,000 as well. So I asked again about the 200 and why it's not on the receipt. She answered "receipt only for reentry permit not service charge"

So I shook my head and left