Failure to replace a grocery unit

My unit took more that for months to replace the only thing am getting is stories call this call that .The supllier failed from the beggining to solve my problem at first the store was blamed but later i realised that the store was given the same feedback i get everytime i have spent about R500 on call following up on the matter to date am still waiting.The suplier collected the unit last month but to date nothing i tried to make follow up as the store that i initially bought the furniture was closed and account was tranferd to didnt answer my calls and failed to call me on the 9th as per the information i got from the call center am tired of this whole situation this is poorest customer service if your using such poor suppliers this is a disaster am hurt