Bad custormer service

I bought a Ryobi Lawn cutter at Game in Queenstown, it only work a half a day then the machine failed to function . I then took it back to the store and I was told it will be sent for a repairs I received a call back from the store claiming that it is my fault that the machine broke and I need to pay for it they claimed that I didn't pour enough oil on the machine that's why I have to pay to fix it of which I think that is just an excuse how possible it is that you would tell that there was no enough oil where as you mix both the oil with the petrol and according to the guide book I've poured enough measurements and did everything according to the manual book and what's funny enough by the time the machine was taken to the checkup already one of the floor consultant at the shop drained out the petrol from the machine so if you claim that there was no oil how did you the tests where as there was no petrol that on its on doesn't convince me that I did any wrong . After a weeks for trying to get to the bottom line of the story I was told its either I pay R1200 to repair the machine or R85 to send back my machine disassembled the I refused both the offers how can I pay R1200 to repair a machine that cost R1250 its like im buying a new machine again and also the R85 what am I going to do with a dissemble machine I am not a mechanic I cant assemble machines. I then drove all the way from Johannesburg to Queenstown to further my complaint only to get another huge disappointment from the custormer service manager Ncumisa Nyembezi told me that theres nothing that the store can do for me for that the machine doesn't have any guarantee or warranty I just bought without checking and that was very confusing for me because when im buying a product im looking for something I will use anytime I want and a sustainable product not a thing I will fix every time I have to use it that's a loss for me if I do so. in terms of a guarantee I believe if something doesn't work you can return it within 7days and I brought back the machine after 4days from the day of purchase and first day of use so if anything is wrong within those days it falls under guarantee and now im told it cant fixide because it falls under warranty how is that possible? Vuyisile Makhubalo sent the machine for repairs Judith Makhubalo bought the machine .