Here’s what consumers have asked with answers from Acorn TV staff and previous consumers.
The best way to get Acorn is to subscribe through Amazon Prime, if you have that. Streaming is immeasurably better and you don't have to deal with Acorn's dishonest business practices.
I don't think they want you to contact them. I've tried by phone and email and get nothing but unreturned calls. As for email, forget about getting any help there. They never answer them. The phone number I have found on their website is 888-870-8047, but I have never been able to reach an agent. I have only been able to leave messages which I don't think they listen to. Sorry I don't have something more positive to say.
I can't answer re the prime way. I had free prime for a short time and when I checked out their acorntv service I saw that in addition to the monthly payment there are certain series that charge extra for episodes. That is the main reason I don't have prime, all the extra charges. I have acorn on my roku, don't really have streaming issues with that. Sometimes the cc when going back to a paused episode. Only issue is their idiotic new format. But learned to deal. Basically, I recommend roku, not prime.
There's a way to contact support through the Apple app store. If you can, and haven't already, download the app and use it to put in a support request. I think they might be more likely to respond because they don't want trouble with Apple; if they ignore Apple customers, they risk having their app pulled from the app store. It's worth a shot. If your Acorn password is fixed in one place, it should work wherever you log in from.