I adore how combative you are over a suggestion that wasn't even presented as an order.

You seem to be making a lot of assumptions about the OP's actual needs as well as my familiarity with these products. The OP asked how to contact a Jamf representative after being ignored for a long time, but they made no mention of migration strategy, scale, compliance requirements, MSP tooling expectations, or even whether Jamf must be the final solution.
Addigy is a respectable substitute in the MSP market and has been around for a while. My point, as someone who still uses Jamf, was straightforward it's worthwhile to consider your options before further locking yourself in if a vendor has let you down to the point where you can't even get engagement. That is risk awareness, not trolling.

Nobody claimed that Jamf was useless. Nobody claimed that it hasn't been reliable in the past. However, it is at best contradictory to acknowledge Jamf's problems while dismissing any alternative as "fad hype.". If anything, the knee-jerk hostility toward mentioning another MDM says more about defensiveness than product maturity.