No Response from NCC

In December 2016, I purchased an oak dining room set from Prestige Furnishers in Silverglen, which was only delivered in February 2017. In June 2017, some cracks appeared on the table top. They repaired and returned the set to me a few months later. It cracked again 3 more times. I asked for a new table but they refused to do so. Instead it was repaired each time. It has cracked again. the table top is now only about a millimetre of oak. I contacted the NCC. They accepted my complaint but did not do anything about it. About 3 months later, I called them and was told to contact the consumer goods ombudsman. I did this and they contacted Prestige but did not get a response. As they do not have an enforcement mandate, they referred the problem to the NCC. The NCC then informs me that this must be referred back to them. I informed the NCC that they had already dealt with this matter. I have repeatedly emailed and called the NCC ( Fikile Mpuli) but have not received a response. This has been ongoing since August 2018, which is more than a year. Please help.