Hi @kate333 
I contacted shopify and they said the agency had added Java code when we started working with them. and it looks like the code was removed on the date i stopped the service
Did the really fix things, or did they use a fraudulent trick to makes reporting tools spit out fake numbers.
Did you only ever read their reports, did you personally only ever use one tool like pagespeed and not something more in depth.
https://performance.shopify.com/blogs/blog/don-t-get-scammed-by-fake-performance-experts-and-apps
Depending on where the code was removed I could potentially restore it and validate if what they were doing was legitmate; though not if it was a script injected by the scripttags api. But restoring it would be for validation only you wouldn’t be able to continue using code without license.
You could also look through archive.org to see if there’s an archive of the site with the code to validate you didn’t get scammed.
If you have an actual budget and need actual performance customizations really done to stop losing revenue then contact me by my email for services, or if you have access private message by clicking here (sloooower).
Contact info in forum signature.
ALWAYS please provide context, examples: store url, theme name, post url(s) , or any further detail in ALL correspondence.