Buggy and Poor Support

I have been chasing for support to fix two issues for months. Their plugin clashed with ManageWP so I have had to turn off the back up for my sites – and they randomly crash my main site when their Divi add on randomly turns on when it’s suppoorsed to be off. They don’t respond promptly (or at all) and have to be costantly chased. There is no real effort to deal with the site crash issues and despite multiple requests to look at the ManageWP problem they have totally ignored me. I purchased the highest paid version but even that makes no difference. This is increadibly frustrating.