For further assurance, if you still have a photo you took when you first got the camera, check that the number of the file name is smaller than the one on your screen.
If it is greater than the number when you first bought the camera it is likely correct. The last four digits in that sequence are likely your shutter count. If the shutter count (as indicated by the red arrow on the diagram) does not show, then press the Info button (see image below) on the back of the camera until it does.When that is displayed you should see one of the screens in the image below. Use the button with the blue arrow on it to view the image.This is the best attempt you have to obtain a value without going to Canon.
Perhaps if I explain the process differently.
