alex2020
Sounds like this would be very frustrating if this were to have happened to me. I've been on the community forum for some time now and have owned a Roku for a long long time. Obviously over the years more channels have been added and The Roku Channel didn't even exist until a few years ago.
With that said I've seen many posts of individuals having issues with anything you can think of but this is the first time I've heard someone say they have subscribed to a streaming channel. A channel that isn't free and cost a monthly fee countless times to then have that channel in the end have zero content and not even load.
I've download so many channels over the years, over 100 easily, some paid and some unpaid and have only experienced what you are describing only to a degree on free, small, and I mean small, and clearly not made to make money, only a couple times ever.
Roku's OS and how as a company it handles channels it allows on its OS compare to the other well known OS/companies like Google or Amazon Fire Stick are well documented and Roku is known as being a lot stricter around what channels it allows on its OS and this isn't really a subjective opinion either.
So I'm genuinely curious what might be happening. So you mentioned you bought a monthly Sub. You didn't mention the name of the channel. It would be hard for another member of this community to discuss this unless you were to provide some of the names of the channels you experienced this.
I'm also curious what channel that in the past that when you have contacted Roku and asked for a refund and were granted one, which one those were, and then compare those channels to the channel you said this happen with most recently. This is a very interesting. If you don't mind sharing about this in greater detail it would be awesome.