Lol yea eventually I did, I kinda forgot I posted it cuz no one responded.

The booking from Decolar went through fine, though my CC was charged by Avianca directly, which isn't my usual experience with OTAs.

Poor it on both websites and it only seemed to react worse when translated. Couldn't get anything working on the AV Brasil website either.

Finally the online chat from O6 worked and the agent was VERY helpful! Spoke decent English (I really didn't wanna phone because of a few different things, calling them probably was the best solution but not really an option) and emailed me my receipt and everything was good with the ticket.

Very excited to check out their product. I think it's the same as AV which I love but I'm curious as to the differences. Also, not sure if anyone else has looked but they don't come up as an option on ITA Matrix, so I couldn't even just go through a physical travel agent for this either. In the end, good price (relative to the other options, they were all within like $5-10 for the most part with lots of choices) and I think the service will be better if mainline AV is any indication.