Would like to close old Hotmail/MSN accounts but billing services won’t let me

I have two old Microsoft accounts; one is a Hotmail account, the other a free MSN account (found the sign up link a few years back). I'd like to close both as they are no longer used, the problem is billing services won't let me! I seem to be stuck in a loop that so many other people accross these forums are - please help?!

I'm able to provide both account addresses and unique IDs

Thanks in advance!