To Audit the SEO Work of Existing SEO Agency

We have a Singapore based website with SEO work currently handled by a SEO agency handling a list of 150 keywords for the past 18 months but with only less than 7% of the keyword ranking page 1. We need a independent audit of the SEO work of this agency, their SEO keyword strategy. The auditing should highlight all shortcoming, lapses and any related matters which result in poor SEO results.

Website
https://vitaminmall.com.sg/