MGM MLB Season win totals ISSUE HELP!!

Here is my problem:  I had a CIN +4.5 vs CLE ticket.  However CLE didn't play 162 games this season.  I vividly remember when I got the ticket it said all teams must play full 162 game schedule for action.  I also called MGM in mid-September asking to confirm this.  On the call I was told yes, if any team doesn't play 162 games it's a push and all bets refunded......So of course I go to get my bet back and I'm told, sorry this is a losing ticket, all bets are action regardless of games played.  

It IS possible I was wrong originally about seeing 162 games required but I asked 10 times on the phone and I'm 100% certain I was told 162 games were required for action.  Can anyone confirm the 162 game requirement or suggest to me what I can do to make sure I'm being treated fairly?