Clean-Up of WordPress Website which has been hacked

A client of mine (based in South Africa) has had her WordPress website hacked. Her internet service provider is Hetzner which is based in Cape Town, South Africa and which is one of the top ISP's in South Africa - hence it has most probably occurred through compromising passwords etc

From what we gather, a new version of Wordpress will need to be installed plus re-uploading all files, gadgets etc There is also an existing blog on the site with many posts already written and the site has 10 web-pages.

We would appreciate quotes to do whatever it takes to ensure that this site is safe again and that any infection/s are properly removed.

You should get a warning message when entering the site that it is not safe to do so.