It sounds like photos of the buttons might be a good idea for a compare/contrast. I've got a Prestigio that definitely doesn't have folding mirrors.
You show me yours, I'll show you mine...
It's possibly just that the original mirrors were knocked off when it rolled over in a horrendous death-crash, so were replaced with standard ones. Nothing to worry about. Or they weren't fitted in the first place.
My mirrors aren't folding, and you can fold them by hand. If they're motorised then they would be very stiff to move manually. I had a car with them once, got fed up of telling people getting into the passenger side not to helpfully grab it and try and bend it out. I also saw some kid in the street doing this once when I left it parked. They also get driving rain, grit and all sorts of rubbish in the pivot. Mine ended up making all kinds of horrible groaning/grinding noises, when the car was almost new. It's very possible that they were fitted but stopped working.