well, since you didn't mention it, i feel obliged to ask the question of whether you can still get in your account, yourself. if the password hasn't been changed, you can just get in and change it. i can only assume that you don't have the password, as you probably wouldn't be asking for help if you still did.

regardless, the best thing you can probably do is get a new email account (something a little more secure than Hotmail, ie. anything else), then tell everyone you have this new account, and any emails from your old account are not, in fact, you sending them.

it might take a bit of work, but it works.