Failure by ACDC to reimburse for faulty bulbs

I bought 8 day / nigh light bulbs recently at ACDC Express, Centurion. Not one worked as they all flickered. I called ACDC and they told me to bring them in for testing. I did so on 18 September 2025. They found the same problem. However, they first told me no refunds. When I insisted, as I already bought other bulbs, they said I would only be reimbursed for the ones I had the carton box around the bulbs, as the manufacturer would not accept it - they are the manufacturers as their logo appears on the bulbs!!! They therefore only reimbursed 3 bulbs and said that I can only exchange the others for the similar bulbs - then they said I must come back as they did not have stock!! I took my money for the 3 bulbs and left, leaving the other bulbs there. Hvaing been there more than an hour to try and resolve, no manager came out and I was left dealing with junior staff running between me and their managers.......!!!