I now have two Marriott Rewards Visa Free Night Certificate for Cat 1-4 hotel. For nine months I've been trying to use the first one I received that expires in December 2017. There is no city where I want/need to travel with a category 1-4 hotel on the days I need/want to travel. Why can't I combine the two Cat 1-4 certificates into a Cat 5 or 6 certificate which would give me more options? Right now these certificates are useless.
When I called Marriott Rewards to ask this question I was told I should just change my travel dates or locations. I kept asking to be bumped up the food chain and then I was hung up on.