Samsung - Gas leak from fridge

The Samsung refrigerator gas is leaking from past ** hrs. I called the customer service and the person who came to check mentioned the problem is with the welding done of an item which was replaced just a few months back. He said I am supposed to be careful as there is chances of fire. I have kids at home who are breathing the poisonous gas, having nausea and headaches and bad taste in our mouth. They are saying the service person is not available for next *days.I haven't received a single call back from anyone so far. We are all feeling sick as we are forced to breathe the poisonous gas. The problem is with faulty way the work was done and for replacement they are asking me to pay *.*k again though I had paid around *.*k just a few months back for the same item. I really want this to be sorted