I guess I don't, I noticed the error message but thought it could be something script-related anyways. I de-activated the windows firewall completely and added WinSCP as an exception but I'm still apparently getting connection problems. Also tried to connect with the WinSCP graphical interface, but I just get the same error. It's weird because this server comes from the same supplier I've used multiple times before where the script works, the only difference is another Windows Server OS.
I'm not sure where to go from here, I read up on https://winscp.net/eng/docs/troubleshooting#connection and https://winscp.net/eng/docs/message_connection_refused but I don't see anything logical that would be apply other than the firewall, which I've already taken care of without improvement. I doubt that there is any problem with my database host as my other computers can connect fine, however I guess I'll check up on it and see if I or support can find anything. If someone could give me some other tips regarding what to do/try, I'd appreciate it a lot, thanks.
I connected my host and apparently the IP was blacklisted for whatever reason (first time it have happened), it was unblocked and now the script is functioning as supposed to :D Thanks for the help :)