Unsatisfactory customer service

I bought Ryobi chain saw 450mm 45cc gry machine end of July 2024. After assembling the machine, the machine didn't start and I took the machine to builders in Protea to assist me and they couldn't start the machine. I then took the machine back to builders next to Clearwater mall where I bought the machine. 2 people from the store struggled to machine and eventually started. I only used the machine once and it stopped working. I took it back to the store as it is still under warranty but they are now saying I need to pay their supplier to fix machine yet the machine gave me problems from day 1. I then went to the store 2 weeks back to speak management as I was unhappy with their resolution and the the guy promised to call me and it's 2 weeks now without him calling me