Lost our biggest client last month. 100+ hours in this week trying to fix it. What actually worked for you to land agency clients fast? (I will not promote)

21, running a small AI engineering studio from Greece. We just lost our biggest client and need to replace ~€8k/mo pretty much immediately. This week I've shipped updates to two of our SaaS products, done a full outreach push to cold leads, and followed up on every warm intro I had. Still nothing closed. Starting to wonder if I'm missing something obvious. For context, we do three things: EU AI Act compliance (big deadline hitting August 2), building internal tools and products for companies, and forward de