Bears Worcester worst service ever

Good day I have bought a gas stove at Bears Worcester branch on the 12th of August the manager told me about this great special that they have for me. A 6 burner gas stove that people had for a week or 2. She insured me that the stove have no problem they have check it out and everything. I paid R8. 470.00 cash for the stove.I have opened the stove for the 1st time on the 24 of August and realise that some of the plates is not working I did report it to the store.Now the manager told me that I should have bring it back in 5 working days and that was not explain to me at all very bad bad bad service.