Location was great, breakfast staff was friendly b...

Location was great, breakfast staff was friendly but all my pleasant stay was destroyed by an immature front desk staff who take care of check out.
She treated customer so rude and only think of procedure without any care of customer experience.
The worst hotel staff I have ever experienced.
She refused to correct banquet fee on my bill insisted that I need to proof by having my agency providing her an evidence by email at 6:15 am Sunday morning,
She said IT S YOUR PROBLEM!!.
I was not happy so I requested to talk to manager, she said she is and threw her name badge in front of me.
Finally I managed to give her an evidence, so she unpleasantly processed a refund.
She then threw a receipt in front of me and left the counter immediately without any apologize or greeting.
This is not the way Hilton staff should treat your guest. I am really disappointed.