Hello & Welcome to Just Answer,
Sorry to hear of any trouble you may be having.
The Error 30 is a "shutter stuck" code, and Canon has had some issues with this and MAY be able to repair it under warranty - assuming the camera is not too old.
BUT, you can often clear this error by doing a "Manual Sensor Cleaning", through the menu system.
NOTE: There are other methods to "unstick" the shutter mentioned out there (on the web), which involve "hitting" the camera, but I do NOT recommend that.
As a reference, I have a link to the electronic (PDF) version of the manual for this camera, and the instructions to do a manual cleaning of the sensors are on page 223 of that manual. Please give these steps at try (or two if needed), and let me know if that works for you.
Manual --> Click Here
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