Unprofessional and ********* behavior

I went to best drive in Braamfontein on the 3rd of December to replace 2 tyres to my surprise when I was suppose to pay they had replaced all 4 of them. I spoke to Dennis that remember I had said 2 even on my online enquiry. They then proceed to remove the ones they put in and put in the ones in the front which were worn out at the back. The back tyres were not worn out like the ones in front. The ones in the front needed replacement ASAP but the ones at the back were much better.