I run a web hosting service and have lots of site migration/cleanup experience, so I can get your files deleted and your account cleaned up for you, no problem.
Please note that if this is a malware infection, the site will need to be completely cleaned. I charge per site/system, starting at $30USD for small PHP sites/simple Wordpress, $50 for average/large Wordpress sites and up from there (Magento/Prestashop/etc are a real pain and thus expensive.)