bad quality generators sold by Adendorff

I bought a MAC AFRIC 6.5 kVA (5 KW) Standby Petrol Generator (with T.F.V meter) from them on 18 April2022 Saturday it stop providing an output voltage after been used for about 8 times. When I took it back to them they looked at it and when they want to remove a cover they said it was banged on. I bought it from them this proves to me that they sell second hand damaged goods as new and then blames the customer for the junk they supply.