Bad service and being **** to about the car I bought they tempered with the kilos the car is old and not road worthy

I bought a car last month on the 18 cash only to find that there are lot of fault finding. I fixed the car until today when I found out that the garage have tempered with the kilos. They sold me a car which kilos on the invoice don't correspond with the kilos on the car. I called Kia today to confirm the service history I found out that the car was last serviced at 2018 in vryheid but they **** to me and said ot was serviced last year. The kilos on the invoice is 83km but on the clock is 87 how come can I travel for 4000km in a space of 1 month? And Kia confirmed that the kilos were 105 km in 2018.i bought a Kia Rio hatchback model 2014.i want my money back and every sent I spent on the car I had a bad service ever now the managers Are not answering my calls😭😭