Bad refund policy for defective products - Wouldn’t recommend

I bought a MacBook in April. Less than 4 months later, the laptop had defaults. I sent it in for repairs. It stayed for 3 weeks in a repair centre with the technicians having done nothing on it, but wiping my memory. After 2 weeks of having it back it is worse than before. I tried contacting them and they want to charge me a 15% handling fee for a factory default which I think is incomprehensible.