Don't beg the University to reconsider you, places are competitive it's best try try something else that you do have the grades for.
Don't ask what courses they still have left - you may end up taking something you regret later.
Don't go into how many points you have and ask what courses they have available for you. It has to be something you're interested in.
There are a lot of courses available on the clearing list don't assume what's left is no good or isn't popular.