my domain name was with a company called XREG.co.uk. who don't send out reminders for renewals. Unfortunately my domain name expired on 24 August and the site went down. I have attempted to renew the name - by transferring money into their account via Paypal. The amount I sent was the amount they asked for (2 years reg) but now the software says it is insufficient, including when I try for just one year. They do not respond to any emails or helpdesk queries. What can I do?