Site Hacked 3 times

My site was hacked 3 times and I’m out of options at this point.
The 1st/2nd time the hosting company (TMD Hosting) claimed that it was WordPress that need to updated with security measures.

So I made updates to the wp version
– change the admin password
– added two security plugins
– back up my data base
– scanned for any miscellaneous files none were found
– scan my desktop for viruses
– Change the permissions to my .htaccess file

I pretty much followed the steps in this link:
https://www.mastermindblogger.com/2011/14-ways-to-prevent-your-wordpress-blog-from-being-hacked/

After all those measures my site was still hacked again (3rd time). I ended up move my site to new hosting co with a fresh install of WP.

At this point I not sure if this will make a difference, can anyone provide a dead sure solution to protect my site from being hacked?

I don’t have this problem with other CMS systems that I use.