Fridge repair ****

My fridge was on but not cooling or freezing. I called Master Repair Cape Town and they came to "fix" the fridge. They told me it needed regassing, which they did and it cost R1 750.00. After 3 days the fridge again was not cooling nor freezing. I then called my insurer and they sent out an assessor. He told me that fault was due to a gas leak and that the people from Master Repair Cape Town should have known and told me about the gas leak and that while it is not impossible to fix, it would be a better idea to buy a new fridge.