i have a problem opening a port

[dedeman 0]

Good day,

 

so i bought airvpn beasue its the best of its kind with port forwarding, so my ISP blocked all ports, and i am a gamer so i need some ports to be open so i was using airvpn and testing i had no problem opening TCP ports, but when it comes to UDP its either i don't understand how to open them or its just doesn't work with me. Here is an example of what i did

the port that i want to open was 6672 UDP which is a game port, so i opened the port forwarding page and put the port in the big white box (first one) it says that this port is used by someone else or kinda thing, so i put it in the local port and submit somehow the big white box turn to something else like 45052 so i went checking if the port open with alot of sites and PFPportchecker program all of them says that the port still close>

please your kind help