I finally got my certificate reinstated after numerous back and forth on Twitter and also emailing Marriott customer service multiple times. It still took an additional week to get it sorted through tweets, DMs, and email so over 5 weeks total. Also, Marriott rep through email originally claimed they couldn’t reinstate certificate but would give me 40,000 points instead which I refused. I went back to Twitter to complain about offer and then all of sudden the certificate reappeared. Worst Hilton experience ever.