Cayce Golf review for Plug in SEO

We've had this app for a month, nothing but issues. Shopify recommended this app after our previous SEO app was banned from the app store. The main functions we needed were passing along Structured Data to google, we're a month in and *maybe* have that figured out now. We also noticed that once the app was installed folks started finding old, deleted products on google and bringing them to 404 pages. We NEVER had 404 issues, now we have had thousands in a fw short weeks. The biggest issue was their support email rejects all emails--their listed support email [email protected] rejects any emails. The email [email protected] must be used which is not listed here, but they will respond back from [email protected] and you will not be able to have a conversation/thread with them. The only way I was able to open a thread of communication with them was by asking Shopify Support to start an email chain. But not even Shopify will give me their true contact email. Honestly surprised they are allowed to have an App without a help email. I have no idea how this app has 5 stars. I am also adding here that it's called Plug in SEO in the app store, but when you download the app the title is Plus in SEO "BETA" which would make sense why it's not working perfectly.