A reseller account can never be changed back into a retail account. So if you have subresellers, you're safe. The worst your parent reseller could do to you is change your pricing.
I could give you a new eNom reseller account, as could many other NamePros members. Just ask. Lowest pricing levels on new reseller accounts is $8.95. But from the sounds of it, your domains are safe in your account already.
[/edit -- PM sent with new reseller account info]