ARB Locker Woes and Warranty Headaches

Like many from this thread, I'm experiencing the headaches of my

$1,110 RD129 Air Locking Differential

RD129 rear locker for the 8.4 axle leaking a second time (presumably from bad batches of bonded seals). ARB customer support was reluctant warranty the labor bill the first time, and now they're denying me the second time.

Any advice for getting through to them? I'm 30+ emails deep at this point. And do I even bother trusting the locker to hold air for a third time (and third expense) or do I just chuck it in the scrap bin? Feeling like I bought into marketing at this point and have an expensive paperweight on my hands now.

Backstory
ARB is refusing to pay labor costs on my 2nd bonded seal failure. Living in Canada, ECGS costs more than having a local gear shop do the work, so I went with that route. For the first failure (2020) I just took the truck to the gear shop for diagnosing, they found that the bonded seal was the cause and they ordered in a replacement and I was on my way. ARB fought me on that first warranty claim because apparently I should've contacted them FIRST. Anyways, after many emails they finally did the right thing and sent me the cheque ($658 CAD). A year later (2021) and maybe three locker engagements since and it's failed again. This time, dealing with the same customer service rep, they are refusing to cover labor costs claiming that they have no way of knowing if the shop installed the revised seal and that they were doing be a "FAVOUR" to be nice the first time. Funny, why not mention your bad batch of seals to me the first time we dealt with this? I feel like their supplier of seals shitting the bed is definitely not a ME problem.


Email outlining issues with their seal provider