GoFundraise does not currently have the authority to remove comments made through the Facebook Social Plugin (comment box) on your fundraising page.
We do utilise the Facebook Plugin, however the comments made through this box can only be removed by the person who added the comment, or by the Facebook Team when the comment is reported as 'SPAM'.
It's best to notify Facebook as soon as possible to remove the comment by reporting the comment as SPAM following Facebook's FAQ here,
https://www.facebook.com/help/795528213825310
To lodge a more detailed report with Facebook, here's how
https://www.facebook.com/help/263149623790594/
Unfortunately removing comments from this box is out of GoFundraise's control at this time.