You already did your part by introducing them to this forum. If they are serious enough about crypto, they will pay the fees for unban. So leave this decision to them.
The OP already explained that he was accused by his friends because of the evil fees they requested them to pay being his reason for creating this thread. I think he did the best thing by seeking solutions here instead of leaving them halfway since their aim is to become members of a forum where things about cryptocurrency are discussed and their refusal to pay the fees does not mean they aren't serious about what they intend to know being cryptocurrency, so I think the op did the right thing and the problem has been solved.