Warranty complaint

My father bought a Samsung microwave 15 March 2023(see foto attached). My father has brought back the microwave now for the 3rd time (see slip attached). Every time he waits about 2 weeks before hearing anything back. When he gets the microwave back it gives the same problem and even has new problems.

He has stage 4 colon cancer and he is not able to go in store every second day to return a devective product. When he tries to phone and follow up, he only gets transferred from one clueless person to another. This is clearly a defective product and he should simply receive a new microwave or receive a refund. I have exactly the same model and have no issues with it.

Your repair agreement states that "the customer is entitled to select: Repair or Replace or Refund." My father has not been given this option! Every time it gets sent in for "Repair"