I purchased Zurich Car Insurance in May, the quote said I would get £50 worth of M&S vouchers, on moneysupermarket advert.

None of my zurich documents mention it or them coming. who do i contact regarding them?

I don't know who to contact but I changed electricity supplier last year. I don't remember reading anything about cash back or similar but a cheque for £17.50 arrived a couple of weeks ago from Moneysupermarket. It's probably too early to worry.