Your hotel need to confirm with who? I'm going to apply for a new Thai Pass tomorrow when it opens. The hotel seems confused about their role in the Thai Pass confirmation. Can you tell me what they are required to do?
I've used True and never had a problem anywhere. Here's a 4Mbs unlimited, never throttled, for 180 days for 2100 baht. It's only 4 Mbps streaming so web pages etc load at full speed. It's in Thai but you can use Google translate on the image.