KIA SANTON IGNORE CLIENTS AFTER SALE

I recently bought a kia picanto at Kia Sandton,the car was at 32k kms, few days after buying my husband started noticing faults with the car, the brakes were vibrating, we took it back, intead of them replacing the discs, they skimmed the discs. A month later we discovered that the 2 speakers at the back were not working, when I informed the sales person that assisted with the sale, he said I can take the car to the nearest Kia or bring it to them, my husband took the car to Kia Fourways, at Kia Fourways they gave us a figure to pay, I the went back to the sales representative to inform him that Kia Fourways said they will charge to check, he did not respond.