I utterly stunned he dared speak to you like some kind of child not only rude but potentially discrimination right there.
If be sure to put a complaint in with their principle and make it CLEAR this was a case of DISCRIMINATION!!
They would never dare speak to a retail customer that way. How dare they say that to you. Would they turn an order away from someone on finance if they changed their mind cancelled then reordered to get a better deal, no way.
And why the hell would you be complaining if the price had gone up? Then you wouldn’t be cancelling what an utter scumbag. Probably upsets his % cut that’s probably why he didn’t want to do it.
I know it’s aggravation but contact Motability online and tell them about the scumbag treatment you just got.