Hi,
Assuming you're talking about a Linux hosting environment, and that SSH access is available for diagnosis of what happened (my pre-requisites). I specialise in this type of cleanup, I've been a web developer and linux systems administrator for 15+ years so I know where to look in both OS and code to get things sorted.
Check my profile or message me if you need more info.
Some brief customer testimonials for clients I've helped in the past for your reference:
"Thank you, you're a God-send".
Josh Strike - Strike Sapphire
"Thank god for you being available, dont know what we would do if you were not around."
Matt Norris, Strand International / Easy Play Poker
I look forward to hearing from you regarding this soon.
Yours,
Kev Green,
oRe Net.