Realm of magic pack broken

I need to know please why is my realm of magic expansion pack not working?? I paid for that with real money and now I cannot travel to Glimmer brooke it says “world not installed”  but I installed it and made sure to uninstall and install again and I repaired the game at least eight times (it also says I already own the game) and I’m still not able to travel to this world.
I have a MacBook Air and It wouldn’t let me get a refund on the website even though I only had this pack for 6 days, but because of the update I physically cannot use the perks of something I buy!? Please fix this I can’t be the only one with these problems