Worst "guest assistance" ever!!! I forgot my charg...

Worst "guest assistance" ever!!! I forgot my charger in my room while I was at a 2 days conference in the Hilton Hotel. They could have informed me about it as we stayed in the hotel until 4pm the day I checked out. I called the hotel around 7:40pm the same day to inform them of my forgotten charger. One person asked me to call back within 10 minutes as she needed some times to look for it. When I called back 12 minutes later, a guy reply not nicely that the desk for lost property was closed. That last call was really not customer friendly so I didn't want to call again. I contacted them by chat after the weekend and I had the impression the spokesperson wasn't paying attention as I had to repeat several times the same information. I received an email 4 days after, without any subject so I thought it was a spam!, to inform me that 'nothing was found in the room after you have check out'. I replied to their email that I was 100% sure I left the charger plugged in so they should ask their staff!! And the reply from Guest Assistance was: give me all the details I already gave!!! They are really not Customer Friendly!! This is not a 4* hotel for sure!!! We had diner there, it was cold and dry!!!