Dissatisfied Customer

I recently purchased a 20ltr Duram external paint from Builders Express in Uitenhage, 3 days after applying the paint the wall started making bubbles. When discussing this with Siphokazi from Builders, she contacted Lunga the Duram Rep, he called and advised that the paint did not cure as yet and the bubbles will disappear. I advised that I would monitor the situation and advise him if anything happens. Last week Saturday when coming out of my home I noticed a huge chunk of paint laying in front of my garage. I contacted Builders once again, Ankia the store manager advised that she would attend to the matter. Lunga the rep came to my property, sampled the wall and took a piece of the paint. During our discussion he committed to replacing the drum, and then later the afternoon he sent me a voice note saying the technician said he/she does not believe the paint could just fall off the wall. Lunga requested a photo of the barcode in order to sample/test the batch. I never heard from him since. I get a whatsapp every second day from Ankia advising they still waiting for feedback from Duram. Meanwhile I'm sitting with a wall which has a huge spot and the inconvenience waiting for a rep that shows no interest. In my opinion as a customer and the CPA that protects consumers Builder Express should take the responsibility and sort out their issues/concerns with Duram and not inconvenience a customer. I advised Lunga, Norah (Builders) Ankia (Builders) as well as Chris (Builders PE) what my expectations are. The only reason I purchased the Duram is because the previous paint I purchased from Builders Fired Earth 2 x 20lts was not enough for my house, garage and boundary wall, when visiting the store to confirm if they source me another 20ltr of the paint I was advised that the color was discontinued and that the code no longer appears on the system in order to mix me a 20ltr, hence me taking the Duram. The wall that is peeling has only been painted with Duram, and the other walls with the Fired Earth does not show any signs of peeling.