2XSR review for Mailchimp Email SMS Marketing

Contacted support to help change my audience for a sign up form. They told me to delete the app and reinstall it. Did that and since then I haven't been able to install the app. Spent countless hour trying but finally they said contact Shopify. I did and Shopify said the same. If I knew Mailchimp customer support would say to delete and then I cant install, I wouldn't have...... Delay my email marketing by a ton.