Iwyze hub and call centre have pathetic service!

I have been trying to contact Iwyze to make changes to my policy, I have requested call backs from their hub, I have waited on the line when calling them myself. Every time I manage to get through, the call gets cut and no one bothers to call me back! Please could someone contact me urgently because if you cant respond to a call me back urgently, what would you do in the case of an emergency????