FINAL UPDATE
Hard work and justice prevailed
The notebook was sent back to me after the unsuccessful repair (see previous update). I took the laptop to the shop it was purchased at. Here I confronted one of the shop assistants with the obvious problem and out of nowhere they offered to 'repair it at our own center'. Strangely how they couldn't tell me this before. But any way, the laptop went out for another 1,5 week. They 'couldn't find any problem' and replaced the thermal paste, which didn't solve the software problems. Not sure why they did that. I brought the machine back to the store the same day after they gave it back to me 'repaired'. And about a week later I was offered a check to spend at the store (here it comes!) ... within 7 days or else I would lose all my money they said.
After this I started looking for legal advice online. And managed to find a government website which had the information I needed. It stipulated that ''any shop located in Switzerland that is unable to repair a product within a reasonable time frame must offer a full refund to the customer''. I brought this document to InterDiscount physically, and the supervisor, looking defeated ( after having spoken to him many times over the course of the last 5 months ) gave me money back. He even tried to give me 100 CHF less, telling me that I bought the computer on a discount which I didn't. Strange since he has the receipt with the 1200 CHF amount printed on it...
But any way I have the 1200 Swiss Francs now. Big relief...
On a final note, after receiving my money, according to the supervisor he couldn't give me a refund earlier because ''you know Asus, they don't want to give in. But since you brought these legal papers. Then we can make something work''