Samsung fridge brakes after only 6 years and service and complaints department unhelpful

I would like to lodge a complaint regarding the way our fridge repair was handled by Samsung. As per the trailing email correspondence we've been busy trying to get our fridge fixed for more than two weeks now. In the end the technician came back saying that there is an internal gas leakage and therefore the fridge can't be prepared. It should be noted that the fridge is only six years old and the technician only stated in their report that the cause of the leakage is wear and tear. I find it very hard to believe that the leakage could have been caused by wear or tear because the fridge has remained in the same place in our house since we bought it.

Furthermore, after the first assessment, the technician wrongly indicated that the dryer is broken. After a week, Samsung managed to find the part and we had to pay around R1300 for it. Now we've been told that the dryer was never the issue. We are waiting on our refund of the R1300 but haven't received it yet.

Please help me understand how Samsung's service can be so slow and inaccurate. Also, what can cause wear and tear to result in an internal gas leakage in a fridge that is only six years old. Surely, it must have been a manufacturing error or does this happen alot with Samsung fridges?