Sorry, did not mean to come accross that way, was just trying to point something out.
If I may say so, your solution of using the ISP's control panel to make DNS changes would be unlikely to work in this scenario.
As far as I can tell from the original poster, this is well past that point as he obviously has a few "issues" that need to be addressed with those that provided him with the domain name etc. ... hence my & Bushfiva's suggestions of going via Dispute Resolution with Nominet.