Hello,
That's what I do daily: I clean and secure malwared websites/hosting accounts.
I'll efficiently clean and secure yours if you want - just let me know.
In most cases Magento needs to be patched after cleaning what's much harder than in case of WP or Joomla, that's why the price is higher. Of course, I'll need an SSH access because it's required to apply Magento patches.
Looking forward to hearing from you,
Adam