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Freezer puncture repair

We have a Fisher & Paykel model P120L small size fridge with a tiny freezer compartment in top right corner. We punctured the freezer trying to break off some ice. You can see a small silver scratch mark in front left of photo. Gas started coming out so we switched it off. Is this fixable and how much approximately to repair? We work 10 mins away so anytime is suitable for job to be carried out.