Hi there - "gaslighting", seems a bit extreme? I'm just offering some help.
The thing with Amazon is that it's super fragmented and you have to complain through the correct channels. After six years I'm still struggling to navigate at times.
General Customer service team members' KPIs are to just close tickets, that's all they care about.
Go to the Product page and click "“Report Abuse”" on the reviews.
Or email the support team and ask them to escalate the ticket to Seller Performance.
Also complain to seller-performance@amazon.com