Used the link, provided current credential and statement from Latam, and applied for the status match challenge. Got response in 5 work days:
You are now enrolled in the SkyMiles Elite Match Challenge. Your temporary Medallion status will be effective on Aug 12, 2017. Please look for the terms of your 90 day offer to be sent to the e-mail address in your SkyMiles account. If you have any questions, please reply to this e-mail only.
We appreciate your interest in our Medallion program, and look forward to proving ourselves as your airline of choice."
on August 11, 2017