Things I do NOT like

I had purchased the Canon Rebel 300D and was told by the salesman that all canon lens fit the digital camera, WRONG !!, since I own 2 canon SLR camera's I thought it would be nice to have the canon Digital and then I could use all my lens WRONG!! my 300 mm,
my macro lens are not Canon lens so I come up with a error 99 thats great. THANKS Canon, for not letting me know are the public know that certain lens will not work unless they are made by Canon.
Buyer please beware of this other that that the camera works great except at night if you do not have a dedicated flash you are in big trouble as with 2 or 3 flash's you battery is dead as a door nail and as a Freelance photographer I need the camera at all times.