remove malmare

My site is getting infected every friday with malware and blocked b google My hosts mocha which are the most uncooperative hosts I have ever had will not help me change the parameters or help me to run m backup I need someone to remove the virus an help me to change the parameters so I dont go through this every week I have had a brilliant coder remove the virus twice now who has only charge me a total of $35 but he thought as I did that the parameters had been changed, but from what I can tell it wasnt done properly The original programmer herovn although I have given him thousands of dollars doesnt want to help unless I give him more than what the site is worth just to make sure it has good security (thats what you get when you help someone out for a year I guess) Site was done in asp as I know it is only a one hour job already I have a budget of $30