agree with Yovani mostly, you could try and to disrupt it, the way you'd do that is just say "Oh... let me check my calendar, I have 15 minutes later today at 5 PM, does that work for you?" 'Oh great, well we can speak then, unless you have just 20 seconds now where I could brief you?" or just try and schedule a meeting then and there " Oh great, 5 PM works, you know what... would it help you if we jumped on a quick Zoom instead so we could talk in a more conventional manner?" just keep dialing regardless bro