Trimtech brushcutter

Bought a brand new 52cc Brush cutter on 20 December 2025 used it about 4 times. Then it broke it didn't want rev up.or anything. I struggled to start it and the recoil starter rope broke and I found that the fuel lines keep on braking making it difficult to start the machine. I then took it back to builders warehouse where I bought it from and they send it back to Trimtech as the machine has a 12 month guarantee. Trimtech then communicated with me via email and said that the issue was the sparkplug wire and that because I used 4x nylon strings on the cutting that, that was the issue that caused the problem in the first place. People I'm by all means no expert but if you buy a brand new machine you would expect the fuel lines to be new and nit braking and perishing and that the recoil starter string to more durable then what it is. To date I'm still struggling with the machine bought new fuel lines and new recoil starter that also broke. So what is a person to do if you get bad service from the supplier. Complain!!!! I will never recommend anyone to buy Trimtech products as the after sales service and warranty is null in void