IP addresses & questions

Long story short, was temp banned on your-surveys for using proxies. Trouble is, I never have before and I have no idea how to use them. Same with VPNs

I was unbanned but now I’m concerned incase its a perma ban for something I really haven’t done and don’t know how I’ve triggered.

Could it be since I accessed the site at a different place other than my home? Or was it a complete freak thing?