What documentation do I need for a TM30 when staying at a hotel in Pattaya?

# TM30 when staying at a hotel (in Pattaya)

Hi, I'm trying to extend my visa in Pattaya. I'm currently booked at Holiday Inn for just 3 nights. They have "entered me into the system" with my passport and TM6 info and all, but they didn't know of any document they can print off as proof or documentation of the TM30 for me to bring in to immigration.

I went to immigration this morning anyway, but they said I needed more documentation from my hotel. They sent me away with the "Notification Form for House-Master, Owner or the Possessor of the Residence Where Alien Has Stayed." But now the hotel people say they can't really fill that form out, because it's like a form for long-term leases/rentals, not hotels. They printed me out a confirmation letter showing my booking, room number, etc. Will that be enough?

I hope to go back this afternoon. Any advice is appreciated!

Thank you!