Tyre Mart Durbanville poor service

Tyre Mart Durbanville recommended a set of Good Year Eagle F1 245/45R19 for my Kia Sportage in Dec 2022 & said I could get 50-60,000 kms if I rotate/balance/align every 10,000kms, which I have done 3 times with some intervals of only 5,000 & 8,000 kms. I have done 27,000 kms since fitting the new tyres & they now tell me my front tyres are “finished” & need replacing. All I got for reasons was a shrug of shoulders & when I asked to talk to a Good Year representative they said he/she would tell me the same. They then proceeded to “quote” me R19,000 for a set of new tyres. I have lived in Durbanville for 38 years & used them for all my vehicle tyres including my wife & 2 sons’ cars over the years when they were Supa Quick. Is this the best they can do? If so, shoddy treatment like that needs to be reported so others are not caught by the same bad service!! No excuse!!!