Worst service delivery ever

I booked my Asus laptop for repairs and I was promised that the laptop would be fixed in 5-10 working days. In 5 days I called in and the laptop was not even assessed. 10 days later I called and it was still not assessed. 14 days later I called again and I was told the part has been delivered and installed, and I should give them a day to complete a final test. 2 days later, still, no one from Pinnacle is calling me for feedback, I called again, only to find out that the part they installed was "broken on arrival". Now I'm told that I must wait another 7 days for the part as it has been re-ordered.

My anger is because they don't even share any feedback, and when you call the office, the call can ring for more than 10 mins. The senior technician is the worst as he is never at his desk to answer any calls.