I'm sorry. I had the same experience 3 weeks ago, when I tried purchasing additional theme park tickets and MDE kept crashing. I finally bit the bullet and called. I ended up on holed for 25 minutes. You are a lot mot patient than I am. 50 minutes? Way too much. At least you can catch up on your reading.
It's the weekends that are always the worst. I learned that the hard way myself. After that, I learned to try and call them during the week if I could!