Can a DN Registrar refuse to modify a Domain Name Server?

My ISP offers a free Domain Name, which I took up, and once I had found and signed up to a hosting site, they informed me that "With a free .net domain your only allowed to link it to a free or paying hosting... We can't update the names servers as requested."

Is this legal? Can I 'force it'? There's not a lot of money involved here, but it seems to me that the principle is wrong - whether a Domain Name is offered free or not, I feel that you should be able to use it as you wish.

Your thoughts, folks?

Thanks,

HBB4.

Read the Terms of Service from the place that supplied the name. It's not really "free" but tied to other services that they use to pay for it. The TOS will spell out what you can and cannot do with it. Next time "there's a lot of money involved" don't opt for the "free" route.