Same here with my bank too - just contact them giveup, but you need a solid reason why they missold you - if you had gainful employment with good death or serious injury in service protection, a good package as to redundancy, you wouldn't need it, would you? Of course you wouldn't - I then used the info that my bank manager had sold it off-site to me when I took him out for lunch, saying that the application (for building improvements) would go through more easily.... That was true.
They won't check as long as the figure is reasonable and you don't object....I got a nice bonus back three days before Christmas, so a nice bottle of wine off the very top of it......