After many years of paying into an endowment scheme the day came where I was supposed to get the money. I have done everything required by them, proof of identity, address, inside leg measurement etc. in advance of the payment date, despite them NOT sending to the right address. They say they will post the money to my bank, consequently 10 days has passed and no money. In this electronic day and age they could send the money by electronic transfer, after all that's how I paid them. So they have witheld a substantial amount of money from me, which is sort of like theft. I have phoned them, emailed them but the "cheque is in the post" is all I get. Can I claim the interest from them on this substantial amount of money?