Reversing an IP Ban

Is there any way I can get an IP ban reversed/get un-banned? I tried to trade a Haunter with my Fiancé to evolve it. Got the same IP error, so I tried to connect to a VPN in order to circumvent the error and was this time met with a banned message. I was just trying to trade with my Fiancé, instead of some internet random I can’t trust, not do anything malicious.