GUARANTEE COMMITMENT EPIC FAIL

I purchased A Wolf Electrical Trimmer 3 October 2024 From Pick n Pay Northgate. I used it for about 5 1o 10 seconds and stopped as it was making an unusual usual noise. I retuned the **** eater on 4 October 2024 as the Motor housing had disintegrated. The **** eater was returned to me some 6 weeks later. I used it again on 18 Jan 2024 and after 2 minutes it was making an unusual noise again and I returned it on 19 Jan 2024. I was notified on on 21 Feb 2024 that I had to pay R565 to have it fixed as I had voided the guarantee by changing the line and not using the guard and I burned out the motor. I did not change the line in the **** eater as I had not used it long enough & it the original line as supp**** and I did use the guard but did not use it long enough to get dirty. In any event I always wipe down my lawn mower and **** eater after use. I demand I get new machine and I am not prepared to accept a repaired machine as I believe that I was supp**** with a demo, materially defective or repaired machine in the original purchase. When I returned the **** eater on 4 October 2023 I should have been given a new machine without question and now they the audacity to demand I pay R565 for a materially defective machine. In fact Tandem should replace the machine with an upgraded machine to compensate me for the inconvenience and for attempting to solicit me a R565 repair!! I will put this on other social media platforms.