Escort Site SEO Audit Needed

My Indian-market escort site has suddenly lost almost all organic visibility. I rely on do-follow backlink campaigns and, until recently, rankings were climbing steadily. After implementing some major on-site changes the traffic from Google fell off a cliff, and I can’t pinpoint why... (Budget: ₹12500 - ₹37500 INR, Jobs: Content Strategy, Google Analytics, Internet Marketing, Keyword Research, Link Building, Marketing, SEMrush, SEO, SEO Auditing, Website Optimization)