Games defective products

A purchased a ryobi lawn mover with the edge trimmer on 25 February 2024. I used the edge trimer on the 28th February 2024 and it stopped working. The service at game was terrible I waited for 1 hour and they could not give me a new one now they saying I must wait for 21 days for a technician to have it assessed. The consultant took a hour to make out a repair document. The goods at game is defective and the manager is of no help it not even a week and I had to send it in for repairs I had to make to trips at my in convenience because I took trimmer and then they want me to bring the mover back which I did refusing to give a refund saying I should wait 21 days as far as I know if goods are returned within 7 days full refund is guaranteed or item replaced with a new one