I don't think that exp elixirs are working correctly?

[Mysticaleagle]

This is getting ridiculous. I bought a 60 minutes combo elixir and I played Haunted runs until the elixir ran out and I didn't even level up from 13 to 14! How on earth is that possible? I did gain experience but maybe like 800? You gotta look into it because it's tiring to waste platinums, play hours to not even level up at a very low level and even more.

THANK YOU.