How do i make a complaint against an Amazon approved Agency? They destroyed my business and i want other small businesses to avoid the same mistake

I hired (Removed by moderator) and they destroyed my Amazon business. Amazon need to take them off their approved partnership list and i have a long list of reasons why.

How do i make a complaint against them so other small businesses don't lost their livelihood too. I worked hard for 3 years to get my Amazon profitable and improve rankings and as soon as they took it over sales and rankings dropped off month on month (despite their big sales targets).