Unpaid claim for OVER A YEAR and now client relationship manager stops responding

This is probably the 15th attempt to have assistance on a claim which is now over a year ago. Between my broker and myself, it has been an ongoing fight regarding a claim for my skin cancer treatments. Eventually, I received assistance from a Clinical Client Relationship Manager, Chantel van Aardt, and I had received payment for only half of my treatment (It is a 2 phase treatment), and Chantel has all of a sudden been unresponsive? I refuse to 'let it go' as I pay an arm and a leg for monthly insurance, and have had to explain this situation to over 30 people at this point. ********** service!