Mulfunctioning treadmill bought at Game stores.

Hello Peter. On 7 October 23 I bought a Trojan Treadmill(TR510) From Game Store(Ilanga Mall)Nelspruit for R8999.By end of November 2023 it was dead.I took it to the store by 6 Dec.2023 for repairs or replacement.It has been with From Dec.up until last week Friday.(9-feb.2024)On this day The store foned me to fetch the machine as it was fixed.It was not tested at the store in my presence.Upon reaching I found that the machine had even more problems.I took it back yesterday (12-02-24)The guy who sells these appliances in the store tested it & confirmed it was malfunctioning.As he reported to his seniors.I was asked to to come back today (13-02-24) as the matter could not be resolved.I requested for a refund on the Item.The technician outsourced by Trojan says he replaced the Motor on the Machine.The machine has more problems.Now somebody at Trojan(Sipho) says I must wait again for the technician to work on the machine.Since I bought the machine I am enduring frustration & pain.No gain for the intended purpose.Please help.Either get it replaced or refunded so I can secure another.I am a ***r-old senior citizen.Frustrated