I would recommend to UniJoin fans do one more effort and report this fake group to Telehram as well. Reports should be sent to
abuse@telegram.org.
This also reminded me of one more imposter:
I suggest to forum users to keep reporting the last group, t.me/UniJoinHB. Since the group has ~10.000 members there are high chances to have people scammed, so please report this group as well.
Does that group still exist?