Damaged stove

I bought a stove form Lewis on the 31st October 2015 to be delivered to Soshanguve pta and the stove was only delivered a week later on the 9 November 2015 when I was initially promised that it was going to be delivered on Tuesday the 3rd November 2015. The stove was connected on 10 November only to find that it was not working properly, I called the branch where I bought the stove on thr 11 November and they were very rude and unwilling to assist and that' when I logged a complaint at the head office. Today I was told that they will send someone to go and repair the stove, I mean If its a new stove why do they need to send out a technician to repair it. The store is now telling me that they can only deliver a new stove to replace that damaged one on the 18 November, this is bad service