what next

i have been hacked some times ago that disarranged and disorganized all my system so i need a single working space for myself only now, either in my device system or in my internet services in any other ways, also a strongroom protections for all my works and accounts and make it invisible and impossible for hackers and trackers from having access over my system no matter how greate the hacker system is, also make their command trigger back to them without touching my sytem.