Builders (Bedworkpark). Trim-tech s****

I bought a trim-tech machine at Builders (Bedworthpark)for cutting grass. With 1 year warrantee. it broke after only using it once! I had to pay R350 for them to fix, which was not part of our initial agreement. I got the machine back, used it for literally 5 minutes and it broke again. Now they want me to pay R550!. BUILDERS IS ******** PEOPLE... They sold me a s**** and wont't take responsibilities for it.