TM ELECTRONICS SERVICE

Arranged a call out with TM Electronics as they are the appointed Samsung repair company. The freezer section of my 4 year old Samsung fridge was not freezing. They advised me that the unit did not have enough gas to operate the fridge and freezer due to a suspected internal leak . I asked them to regas the fridge but they refused saying that if there is an internal leak the gas will cause an explosion in the kitchen because we have a gas hob. I paid the R750.00 call out fee . How can Samsung fill their fridges with dangerous gas , that can explode, and if so in what instance can you safely regas the fridge in order to get it working again. Do Samsung fridges only last for 4 years