Car purchase

I bought a toyota yaris 2020 and drove it for 8 days and then it just went off and didn’t start, I asked them to atleast find me another car if this one is gonna give me such problems at an early stage, what more in future? they refused. I phoned the bank and told them my situation, they told me I have a right to cancel the deal within 30 days, they still refused and insist on fixing the issue. The worst is when I was offered a loan car with no petrol by their manager Tiaan. I felt very disrespected.Ford Motus germiston really dissapointed me.