Who can you contact when you feel an elderly person is being taken advantage of by a retailer?

The problem has been resolved and everything has worked out for the best, thanks for the answers I re'd

Just threaten to go viral with it and to go to the local news or newspaper on consumer help line.
Dad, with an amputation (missing the driving part of the foot) at 91 was insisting on buying a new car, we had gotten rid of his. I said NO, I figured even if he suckered a neighbor into taking him to a dealer, who in their right mind would finance a car for 5 years to a 90 yo..... What is the probability of the car being paid. Out of curiosity I called the dealer and asked, and they said they would!

If you can sign the papers, they will sell you a car, even if they darn well know it is not a good idea.

Should this person be driving if they aren't alert enough to know a rip off?

P.S. Is it about buying a new car? If so, I might contact the automotive manufacturer directly to say that one of their dealers is trying to scam an elder. They would have more sway.

So what kind of advice are they giving the elderly person? It's probably not illegal, just unethical.

I did contact the dealer and he was a joke

I'd call the owner of the dealership, unless that's who's telling the elderly person to buy their car. What kind of advice are they giving the elderly person?