You can't spoof IP and yet hope to receive a reply back at your (or your VPN server's) current IP. That's just not how networking works. You need to brush up on TCP/IP fundamentals. Even spoofing for unidirectional communication is often blocked today by ISPs due to its widespread abuse (syn flood, ddos, etc)

Try a different VPN and pay close attention to server IPs and their whois. There are some real shady ones whose "server" pool is essentially malwared unsuspecting internet users, that should get you a residential-looking IP rather than datacenter.