Seeking Advice on Booking More Meetings with AI Personalization

Hey guys! Looking for help - I'm an experienced seller - and am currently booking 2-3 meetings/ day. A guy approached me and said he could help me book +1 meeting / day using his Instantly + AI personalization stuff. So far we've booked 0 meetings after ~10 days. Anybody willing to talk to me about this? Is it just nonsense, or am I/him doing something wrong? We've already addressed standard stuff (warmups, low bounce rate, text only emails, 90+ quality on Lavender ... ) the copy is similar to what I use on LinkedIn Sales Navigator to book meetings successfully.