Don't tell her the truth, make her puzzled.
Few days ago I had to help my grandma with hiding some utility cables behind a cover on a new door. I decided that a guy from tv cable company would be the most experienced with this and called their support. Please describe your issue? TV has no signal (it has). Are you at home? Yes (no). Let me check it... hmm, it's okay on our side. Did you try to rescan channels? Yes (of course not). I'll transfer your call to an operator, please wait. Sure, was nice to meet you too, stupid bot.
Make sure that you "have" a direct service problem and it doesn't align with scripted or online solutions.
As if anyone with half a brain would have have been stupid enough to shout at their phone for 20 minutes trying to get your shitty arse robot to understand them if they could have gone online instead.
There are plenty of people who call-first, to be fair.