Hi trt
Certainly some people with no regard for their elders, treat older folk like they're idiots, on occasions, and much like Andy says, really gets my boat, if I spot in a shop, an airport, a restaurant, and so on....sometimes, so much that I say something to the inconsiderate so and so.
Doesn't affect me at the moment, as I'll be 51 this April, and still as sharp as a button, and never allow anyone to talk disrespectfully to me...If they try, they get a tongue lashing alright.
It must be annoying for you, trt...so whether on the phone, or face to face, Just tell them that YOU are the customer, and therefore should be treated as such...and as such, are always right, otherwise you'll take your business elsewhere to a company that cares ....That should shut the piggin' oik up.
Older people should be respected... I'm a firm believer in that. :-)
Good luck, trt :-)