Often they're measured on time to complete a call/ticket and they're not allowed to hang up on the customer, so in cases when I need to get something done, I in

Often they're measured on time to complete a call/ticket and they're not allowed to hang up on the customer, so in cases when I need to get something done, I insist that I have all the time in the world. You can keep me on hold for the 3 to 6 hours this will take, I don't mind. Just keep me on hold and I'll wait patiently, Yes, I do have all day. They'll cajole me to hang up, say that I'll get a call back, etc, but I insist that they can keep me on hold while we wait for whoever to finish their lunch break or get back from their meeting. Often the issue gets resolved in 10 minutes this way. And surprisingly: it stays resolved with no worse success rate than playing call back tag. If it's actually taking a long time (which doesn't happen often), then I hang up and try a new rep or a new support channel.