enabling the setting on your phones settings to have a delivery report for a text message you have sent does not work with giffgaff
you need to insert the code at the start of the message - see the above post.
the downside is that you would have to key this in front of every message for which you want a delivery confirmation for.
Weeman I wish GG would do something about such members but don't think the forums can be monitored in such a way.
That's why we are here as well mate,we can monitor the forums and report things like this.
Usually the ed's pick up on stuff like this,and have a word with the member.