If your site link has been banned from Facebook and you are no longer able to post any link to any topic, the solution is here
I offer you the service of unblocking your site link from Facebook as an assistance provided at a symbolic price for each site owner who suffers from blocking his site link on Facebook.
For only $10 I will unblock your one site link.
When the ban is unblocked, you will be able to publish your website link and any topic link again without a problem
When you unblock the ban, all the links you posted on Facebook will work again.