Upvote:0
For the reasons mentioned in the other answers, you are not entitled to compensation. When they sold you the ticket, they could have assumed you held a Brasil residence permit, or a student visa, or any number of other situations that would have allowed you to stay 120 days without a problem.
For people who come to this answer, I am going to suggest a different solution. Do not modify your reservation to return earlier. Buy an expensive, refundable one-way return within the time limit the airline requires. In Brasil, once you have extended your tourist visa, apply for the refund. If, for some reason, your extension is denied, you can still recover some money by cashing that ticket in and advancing your original return date.
Upvote:4
Am I entitled to some compensation?
Unlikely.
Here is how it works:
The airline followed their stated process and you agreed to this process. The only potential angle would be to proof that Timatic actually returned incorrect information for your specific case. While not impossible, it's unlikely and it would take significant amount of time and money to proof any error on their part.