Terrible customer service

Staff B.Mabe was not helping at all. We were waiting in the line and no one was in front of us. We approached her, she GAVE us the hand and did not say anything, so we waited another 10mins for her to finish, the she give us another gesture (I assume she asked us to approach) she throw the pen for us to sign the receipt, I told her its for the tax return, we need the stamp. She didn't say anything and left while we were still standing at the counter. After another 20 mins waiting, we saw her start serving another customer at other counter, we asked her again for the stamp, she finally said something to us that we didn't remind her! I am ver disappointed at her service! And during the time we were waiting, nobody came to ask us!