Google does not hold a grudge
Google's John Mueller has said that Google does not "hold a grudge" if your website has technical issues. When you fix the technical issues, Google should return your rankings back to normal. It may take a bit of time, but getting your website "healthy" and back up to Google standards should allow you to achieve the most out of your website, and Google rankings. At Invernetwork, we go through a step by step process of checking many technical aspects of your website. Often, these steps are more important than the On Page Optimisation around Keywords. Getting your website healthy, and responding well to Google's Search Engine is key to SEO success. Contact us today for a free website evaluation.