I said that I think it could be mistaken identity, but I'm not sure. How can I be sure if they will barely tell me anything and won't return my calls?
Think, Alan, think!
The cash value is less than $1000.
It is not a waste of time, because that money is owed to me, and I am not going to let them keep it.
If you believe money under $1000 is so little, agree to pay me that amount and I promise to drop this matter and never speak of it again.
Otherwise, you have no right to tell me what money is "worth the time" for me to pursue.