What nasty message do you get?
VPNs mask *your* IP address. They are still using their own to get on the internet. If the website or business is able to detect a trend of certain IPs listed as belonging to the VPN, they can still blacklist those IPs. What you may need to do is connect through another portal (i.e. another city).
I live in Panama but I like watching American sports instead of 24/7 futbol. If I try to connect to somethings direct without a VPN, I will be told that my IP is outside the range for the licensing of their service and that I am not allowed to view. If I use a VPN (usually I go through Miami), sometimes I get through but other times I get a different message saying they can’t identify me because I’m using a VPN.
If I stop the VPN and attempt to sign in through a different city (say, Dallas or San Francisco), I can get through sometimes through a different IP address that the receiving site hasn’t yet figured out is tied to a VPN.
That’s how the system works. Hope this help.
BTW, I’ve used both Nord VPN and Express VPN. Generally, I found Nord VPN gave me more access to what I wanted than Express VPN, for what it’s worth.