Sage Business Cloud Accounting

Really struggling with the app and my Shopify account. Have reached out to their help desk with no luck (zero reply). Does not integrate POS at all. Does not transfer over 100% of sales - the odd one or 2 a day seems to go missing. Does not process refunds (credit notes) properly; bases the credit amount on the value of removed line items instead of actual refund amount. No alternative at present so trying to keep at it. Nightmare.