Nothing says they visited the office. The employees could just have well told the reporter that by phone. Or, they could have made it look as though a raid occurred.
Do you take everything a reporter writes as Gospel? I don’t. Nor am I interested enough to make a call. If you want to, go ahead. You make use of this ploy often enough in posts; try it yourself.
Just out of curiosity, I tried calling and got voicemail for a Gavin who wrote the article.