Catholically review for Shopify Marketplace Connect

I was forced to migrate from a perfectly working app to this "new" one, and it's been nothing but problems ever since. The lack of support is infuriating and unacceptable. My main issues are: I cannot see my products. I cannot link my products. My entire shop is out of sync, and I don't have the time to fix problems that this app caused. Please fix my shop immediately.