If you want to have a bit of fun with them, you could call them and go through the following scenario:
You: "Hello. I believe you wanted to speak with me about your claim."
DCB: "Ah, yes... We'd like to offer that you only pay us £200 and we'll call it quits."
You: "Errr... I don't think so."
DCB: "Ah, OK. How about if we make it £100?"
You: "Hmmm... Let me think for a moment... Nah!"
DCB: "Oh dear. How about £50?"
You: "Uh uh. Not really."
DCB: "What amount would you consider?"
You: "How about £25?"
DCB: "Oh, OK. How would you like to make the payment?"
You: "Nah... I've changed my mind. I'd like you to pay me £100."
DCB: Dial tone after they hang up.