Audit and recovery after low quality SEO

The customer asked for a complete website review.
Previous story A relatives in a competitive company.
As a result: all copy + texts were duplicated in WEB 2.0
All URL pages before departure are changed by 1 symbol.
All 10,000 purchased links are 404.
In the texts hidden links to the competitor’s website.
There was a systematic diversion on the site.
Traffic drops to almost 0, sanctions by Google.
What has been done:
Restore the structure of the site
Connected 301 and 302 redirects modified URL
More than 1,000 toxic links are removed
Repeated all duplicates of texts
All outgoing links are removed
Working with SERM and CRAUD
At the moment, sanctions are removed and traffic of about 100 per day.