You will need to change the paper size to A4 within the printer settings.
I can assist remotely with this.
Did you do it within the software you are using, or within the print driver settings?
Can you attach a screenshot of the settings?
You should see a Send File or similar attachment option....
Ok, if it is still under warranty then that would be your best option.
Let me know if I can be of any further assistance at all.
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