Case dispute opened but cannot respond to it?

I have a case dispute opened up against me but I am unable to respond to it - when I click on "respond to case", it just reloads back to the same page. I contacted ebay and they said that the technical department will look into it and for me to contact the buyer which I did and the buyer informed me that they never opened up a dispute and they have contacted ebay to remove it.  I am still waiting.....

 

Has anyone else had a similar issue before?

 

Thanks,