Hosting (WHM + cPanel) professional needed for malware and WP problems

I need someone who is good with Wordpress plus good with hosting issues. I have hosting with WHM and 5 separate cpanels on which I have around 50 sites, mostly WP blogs. I have problem that my sites are sending some spam emails. It is some issue that I had months ago and now again. (check images). I need someone who will check those issues and fix it. I will pay amount you ask for, not per hour as I do not want to pay someone per hour who will learn on my issue. If you are professional you know average how many hours you will spend so give price for that. Also, as it is mostly problem with Wordpress I need that that person is good with wordpress issues. If job is done good I plan to hire that person on a long run to maintain my hosting and also to keep updated my blogs. I will give you whm access and also login access to hosting support ticketing system if needed so you can work whatever is needed. IMPORTANT: I will not pay any single $ until job is finished 100%. Malware and viruses should be clean and sites working. I must say that my whm has 5 different cpanels and probably all of them are infected. But 2 of them are already paused and banned by my hosting provider knownhost for spam and it is done for 24h and tomorrow will be online and up again if problem is fixed. So problem must be fixed in next 24 hours or similar. p.s. Please do not apply if you are not good with hosting issues. I have 50 sites and do not want to risk that some amateur who is not good makes even more troubles or deletes something which is important.