Heck I was with an agency in Louisville, KY that not only refused to release me as they told me they would over 10 times, they stopped paying me on renewals all together and now hold over 1,000 dollars in reserve account money that they won't give to me either.
Some people out there are absolute scum. I've learned that the hardest way possible. Some of the business I wrote under them took me over 1 year before I was paid.
To make matters even worse, I discovered they are paying agents under street level on most contracts. Its absolutely atrocious.
It appears that the release wasn't the only problem. If they kept your renewals it appears as though you assigned your commissions to them. Big mistake!