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 about a retailer that displays the wrong returns info online? Plus, we have a lovely success story involving a 9-year-old who’s doing jobs for her parents for pocket money! If you want to ask Martin a question, his Question Time podcast lets you do just that! You can ask him questions about absolutely anything and everything (within reason!) – so if you’ve always wanted to know which chocolate he prefers, how many sudokus he can solve in a day, or have a very complicated question about your personal finances, email it to MartinLewisPodcast@bbc.co.uk.