Consumers are receiving a pre-recorded message in Spanish claiming that they have won a prize. If you respond as an English-speaker, you are immediately disconnected. Spanish-speaking callers are told that they have won a free Mexican vacation if they are able to get through to the 859 phone numbers.
As with all of these types of offers, there's always a "Gotcha". The best way to stop this practice is to file complaints with the Federal Trade commission (FTC) at www.ftc.gov [2]. This federal agency responds to the quantity of complaints received for a single issue. Therefore, you will help yourself and others by filing an online complaint ASAP.