The fair use policy is there:
I was warning you that if you send confirmed packet, you might violate the policy:
At most 10 downlink messages per day, including the ACKs for confirmed uplinks
I was not talking about the number of join request.
I understand now that the different join requests were due to you resetting manualy the device, so nothing wrong about that in your logs.
At the end, I am lost about what is your problem…
You are not able to send data to your device (downlink), is that correct?
How do you send the data? What data are you sending?
What do you check on the device to know if data have been received or not?
dfs