After Sales service shocking. NO Feedback/updates/work done. 3 weeks but no further than day1

Below is the mail I sent LG about a service provider Monday (now Friday). I have not received any feedback since and still waiting. 3 weeks now and still no further progress from day1.

"I handed in my monitor on the 17th of Feb for a warranty claim. The technician and someone from the front immediately went and checked the monitor. They found the problem and booked it in.

I called 28 Feb to find out 8 days later that apparently nothing is wrong with it. 8 days and nothing has been done and no feedback provided. Every time I phone they say they will call me. Still not one call back to me. Xecutronix staff themselves saw and noted the problem. This is a faulty unit as they even confirmed.

I went to Xecutronix again on Sat 3 March. Within 30minutes the fault (green line) came on the screen. They said they can now send it in for fixing/replacing/credit or whatever needs to happen. Two weeks later and seeing the fault a second time requiring me to actually drive all the way there to show them AGAIN.

I called today 06/03 and the person said on the job card it says there is nothing wrong. This tells me that since Saturday almost 3 days later nothing has been done. I have been waiting two and a half weeks now and still doesnt seem any closer to a solution."

Still no Feedback. No one comes back to me, responds or anything. Still in the dark 3 weeks later.