I ruined my play/pause and skip buttons! pleaseeeee help!!!!

Long story short: I got annoyed that iTunes launched when I pressed the play/pause button. I did a google search and stumbled upon the solution on this website https://www.howtogeek.com/274345/stop-itunes-from-launching-when-you-press-play-on-your-macs-keyboard/

It basically says to open terminal on your macbook and put this in --> launchctl unload -w /System/Library/LaunchAgents/com.apple.rcd.plist

It turns out it makes te play/pause and the skip and previous buttons stop working :(

I have no idea how to fix it!! I rather have iTunes launch than those buttons not working. please help!!!!