Typically Public doesn't add US roaming packages to your account. You manage your own account. Did you mistakenly add it yourself?
You could probably get a refund if you didn't use the add on. It's not a one click process so it's strange that this happened unless someone else has access to your account.
Hello! Sorry to hear you had an unintended charge. Please contact customer service and they’ll be able to assist you.
Please click this link below to message customer service. Their hours are 9am-10pm EST so you’ll hear back sometime tomorrow:
Keep an eye on your mailbox here as that is where your reply will come in (envelope icon on desktop, click your avatar icon in the corner and then click messages if on mobile).
Or click here to view your messages for when they respond: