Storm proxies is great, but I don't see how they could even make that claim unless they looked at a bunch of the exact html responses using their proxies and your scrapebox. I suspect they don't log that anyway, so unless you provided them logs as proof then I they couldn't actually know that.
Thats my 2 cents, they have a massive pool of proxies and tons of users using them for anything at any given time. So I wouldn't say there is a functional problem with storm proxies, but if their ips are blocked then they are blocked. It just happens. At that point its not a fault of either storm proxies or scrapebox, its just life with google blocking ips and lots of users all wanting google data.
You can go to help >> show error log >> index checker - if the errors for google are 503 or 302, its an ip block.
Index checking is hard, google really cracked down on the info: operator, which is what is used to check indexed. I mean they cracked own on several operators in late 2017, and thats one of them. So its harder then ever to check indexed.
