App/Website errors and bad customer service

Since becoming a client of Momentum, I have not been able to use my app and keep getting an error message. Trying to contact them via phone means that I have to hold for more than 15 minutes and, to date, I always gave up on the process. However, it seems that, if I want to make use of the procedures covered by my insurance, I have to apply on my online profile. My products are, however, not linked to my profile and I have been trying for a week to contact Momentum to sort this out. I am always on hold for more than 15 minutes and none of my emails are answered.