Brazilian channels

I really like Strong8k, their service was great during the World Cup and the vast channel line-up is amazing. However I they are not so good when we’re talking about Brazilian channels. For other countries we usually have entire local cable provider lineups. In Brazil we had Claro and Globosat but they dropped it. Some popular local channels like Globo Rio transmits wrong feeds or low resolution one very frequently, same for Globonews. I suggested improvements thru my Strong8k provider but nothing changed. Any hint how to contact them? Brazil is a big TV market, for sure the largest in the south hemisphere.