Question Time: Am I due car finance payback? 9-year-old learns about interest! If my bank overpays me, can I keep it?

In our Question Time podcast, Martin Lewis answers your questions including: is my car finance agreement covered by the mis-selling redress scheme? Can my partner and I couple up to maximise cashback offers? I’ve told Monzo its overpaid me but it’s done nothing, can I keep the money? What can I do…