We're sorry to hear you're experiencing this issue.
Here are some simple and well-known solutions to the problem you have brought to our attention:
[ 1 ] Check that you are entering our correct IP address:
I see that you have stated this, but it just takes one second to double check!
The IP is
play.mcpz.net. Alternatively, you can also attempt to use
creative.mcpz.net if this doesn't work.
[ 2 ] Be sure you aren't on 1.13 or the latest version of Minecraft.
Our network currently does not support versions higher than 1.12, thus, it would be ideal to check that you are not running this version whilst trying to connect. It is not recommended that you use it even if you are able to access the network as it comes along with glitches and bugs.
[ 3 ] Confirm that your internet connection is stable.
Sometimes, our internet can have its moments and for lack of better words, lag.
To find if this is an issue, you can Google "ping test" to see if this just may be the reason.
The lower the number, the better!
In the case that none of these work, please contact me or another staff member and we will try our utmost best to resolve your problem.
Answered.
If you have any further inquiries regarding your question, do not hesitate to contact me privately.