This week on the podcast, Martin has been doing some investigating – and millions of people are owed some serious cash in car finance repayments. He shares his step-by-step guide of how to find out if you're one of them. Martin has also been looking at whether you actually are being held in a queue when you call a customer service number. Plus, hear some of the money saving tips that listeners have picked up along the way, that might just help your wallet too. Martin Lewis is the founder of Money Saving Expert, but other sites exist.