incredibly poor service

Bought a laptop in December 2014 Due to defect returned today for repair under warranty Tried to force me to take extended warranty at a cost of R900 failing which he would not give me a loan laptop to use After an argument he relented Asked me to return later so that he could load software on the loan laptop Returned after an hour and waited for another hour only to be told that I will have to load my own software After another argument he agreed to load the software Upon my return home I realised that the drivers for the modem were not loaded I went back at 16h00 and he promised to have it done before close of business It's 22h00 and still waiting