CTM ive spent R8026.36 to purchase my tiles if you cant give me the quality you promise refund me.

I purchased tiles to the value of R8026.36 at CTM in Mitchells Plain in 2016, I asked for none slip outside tile and the consultant advised me to the Kilimanjaro Turkana rust and Phemba tile. I purchased the tiles and a few months later had the tiler to install it. Cape Town suffered a drought period during 2017 and when it started to rain I think it was late 2017 or winter 2018 I discovered that the tiles are slippery when wet after walking on them and falling with my face onto the floor. I reported this to the manager ben at the time and he said he will resolve the matter. Ben left the store and was replace with a new manager named Aldridge. The new manager agreed to have a anti slip done on all the tiles however when the company came out to do the anti slip I had informed the guy while we did the anti slip test that there are still areas of the tiles which are slippery. I had report this back to the CTM store manager and he had agreed that he will be replacing the entire section of tiles which I had purchased and I explained to him that he will replace the tiles but who would be liable for the payment of the tiller. After then I had slipped twice on the tile. I went back to the store to sort out this matter and the manager re-ensured me that he will send out the tiller and have the entire section which I tiled (front and side section) retiled with an anti – slip tile. The manager now came to a decision that he will no longer be retiling the both section as he feel that he will only be retiling the front section. I am disappointed in the service at CTM, I asked for a none slip / anti slip tile to use for the outside and I spent more than R17000 to tile this area and now I am sitting with problems due to the quality of the tile. I want my refund my purchase or alternatively I want my entire area to be retiled with a none slip / anti slippery tile. Bronwin ***