Klaviyo: Email Marketing & SMS

Support here is the worst. We are trying to connect to Klaviyo our other shop for another country and have contacted Klaviyo at least 10 times since 2 weeks. All we get are generic replies and it seems nobody is reading our mails or helping us!!! The problem is this app haa a bug. After we try to connect another user it sends a link that is already expired the mment we click on it to confirm. Last week we waited 5 days to get another generic reply and see no interest in them actually checking the problem and helping us. This is the worst support we have experienced here on Shopify!