Disgusting service

My son purchased a MacBook air for my daughter's 18th birthday. Within 6 months it already had to be repaired. Then 3 months after that it started having the same problem. Obviously with lockdown we were unable to take it in to be sorted. Once we managed that the device was no longer under guarantee even though it had been fixed once already and the problem re occurred. Went to the I store in Fourways Mall to complain. Service was shocking, I was told that there was a bad batch of that particular device and I must be one of the unlucky ones. How on earth can you tell a customer that when R22000. 00 was spent on a device that lasted 6 months. The MacBook doesn't leave the house and was barely used. I am absolutely fuming that this is what I get told. No help, no solution. Really disgusting service