I too installed my homelink module myself and had a hard time getting Tesla to activate it. They told me to buy it from them for $350 or else they wouldn’t do anything.
I gave up for a short while.. then I had an issue with my repeater cameras (both the left and right cameras had water damage). The tech came to warranty the cameras and fix problem. Once he was in my car with his laptop I asked if he would “unlock” the homelink in the config file if I got him a case of beer. He hesitated at first but then looked at me and smiled “sure bro - I like any IPA”.
Only cost me $18.