who has jurisdiction?

Situation is:
Mother and Father were never married, but had a child.
Parents dissolved relationship, Mother assumed residential parenting - nothing legally documented.
At the time of relationship and birth, resided in County "A".
Now, Mother and Father live in County "B" and "C" respectively.
Mother filed for child support in County "B" - after she signed-off 2years ago in County "A" and the case was labeled closed.
There is still no formal rule for visitation and Father wants that established and is also interested in pursuing custody of the child.At this time, Child Support awarded to Mother in County "B" and will be appealed pending custody case . .
Most importantly, he has not seen his child for 2weeks when he had been seeing her every other weekend and overnight on the opposite week - mutually agreed between parents. Mother has decided she is not going to give the child anymore and nothing is legally established making her do so.
Problem is:
Father cannot get Counties A, B, or C to file his custody case. Each and every one has stated they "do not have jurisdiction". County "B", where the child now resides said they would call him with a court date, but that was 3 weeks ago and no one will talk to him. If he does get to talk to anyone, he gets "it is not our jurisdiction" or "you need to file in your county".
Have you ever heard anything so crazy?? What is he doing wrong? How does he get this case heard?

What state is this?

Did he take County B's child support order with him when he tried to file in County B? If not, that may help. Otherwise, I think you'll have to wait for the hearing date, or hire a lawyer.

THis is in Ohio. He did provide them with the child support order. He also has an attorney who has checked on the pending court date and the attorney gets the same answer - - none has been set. I'm not sure if they need more information, or what the problem is.
The pressing issue is to establish ANY type of visitation legally with his child, if even a temporary order and he cant even get that done.
It seems to me that the CSEA is a separate issue than the custody/visitation, however the only court date we can secure is an appeal to the child support. He will look like a dead-beat dad if he goes in there to the hearing without anything in progress. He most certainly is not that.