This is a story I hear all too frequently - web designers going AWOL and leaving the client high and dry
.
If the hosting account is registered in your web designer's name then it's reasonable/expected that the hosting company won't hand over any logins.
Transferring the domain would be my suggestion too (assuming that is registered in yoru name!) however I'm assuming you need the files/databases from the hosting account?
__________________
Adam Smith - UK Webhosting Ltd. - (0800) 024 2931
www.tsohost.co.uk - premium quality, budget price virtual hosting in the UK
Company reg: 04977925 VAT reg: GB 833 9677 84