Open Ports in NAT

This might sound like a dumb question but here it goes:

I have a bunch of servers hosted on my ISP,(private ip 10.x.x.x NATtted to public ip 62.xx.xxx.x) and the firewall management is done by them, wich means if I need to open ports I need to fill a template and send them. I sent them a few firewall configs and they applied and confirmed.

Example of the request:

OPEN any source -> Public IP , Port 13000 and 14000 TCP

BLOCK any source -> Public IP, Port 80

Is it possible to not being able to connect via telnet but the port is open?

What about the other way around? They said they blocked port 80 and I can connect to it via telnet.