I can't even imagine how frustrating and hopeless all that must seem! Holy craparoni! BUT--you made a start on fixing the problem, right? You called and got someone to help you. "The journey of a thousand miles starts w/a single step", and the cleaning up of a zillion messes begins w/getting someone to help you find a corner to dig out from.
Best wishes w/all of that--I'm sorry you have to deal w/so much crap but feel confident you'll overcome! Again, my sympathy on having this dumped on you.