Bad service from Builders

We bought a Goldair gas stove with electric oven from Builders Warehouse in Polokwane in August 2018, for R9,000. We only started using it in September when the house was ready. In September we contacted Builders and after a month, they sent out an Independent contractor. He told them that they needed to replace the stove as some parts were missing. The one front plate does not switch on, the back plate is totally not working. William then did not know who they sent and what happened. Up to now, William has been giving us the run around, and we are still waiting up to today. Builders does not give what they promise. I am fed up with them and the R9,000 stove. Rene Kidd