If you want your money back I'll buy the Diana for $8.00 plus shipping.
The Diana was made to be given away at carnivals around 1967. There were very few controls in the production and the cameras vary from camera to camera. If your diana makes good images then your are one of the lucky ones. Mine has a plastic lens and several light leaks. Making for a unique picture each time.
The friends of photography, now gone, had a major show featuring Diana images made by photographers from arounds the world. It was a major success. The Diana has gained cult status for reasons that escape us all.

My offer still stands.
BTW, do you have the box and carrying strap that comes with it?