kg277 Hi! 

We know it's been challenging for your business to encounter an issue regarding QuickBooks Online (QBO) being slow. I recommend contacting our QuickBooks Online Support to further investigate it.

For future reference, you can click this link: Why is my QuickBooks Online slow? to learn more about the performance overview for QuickBooks Online, and how internet browsers and mobile connections can affect it.

I'm still around to help if you've got more questions about QuickBooks Online (QBO).