Bad attitude for reporting broken item

We purchased Contessa 8PCE Dining Room suite on the 19 May 2015 through my wife K.V. Sepato,at Morkels Mabopane Central City, acc. no. ***.Sale person is Connie. Took delivery on 22 May 2015. Early Dec. 2015, one of the chairs cracked under sitting pressure. Broken chair reported 11 Dec. at branch through Connie. Logged the complaint, promised to attend issue in Jan because its festives. Jan, nothing happened. Connie reminded in Feb, still no response. Phone her on 26 March 2016, she tells me to phone office as she is off duty. Told her to do that herself, she refuses and says she will only do that on Tuesday when back at work. So rude on the phone. Bad attitude. Please help. Been a long time really. They seem not to care