Shocking customer service all around

I purchased 3x solar lights as they were on promo for R68. I put 2 up immediately but kept the 3rd. About a month later I decided to use it as well. About a month later that one stopped walking on the last few metres. I took it inside then decided about 2 weeks later to take it back. It wasnt cheap and my others were fine. Centurion didnt have stock but saw that Raslouw had a lot and advised to go exchange it there. That was after looking around, asking if theres someone in the lighting Dept who she said she’d call him. By chance we walked around looking for something else, and I asked a guy standing there. He said he works in the dept and that is the main desk. So how am I supposed to know that when I’m 2 aisles away in the other end. No signs to say staff stand at main desk around the corner!!! He did help me then and would phone me regarding batteries for single solar lights that Builders sell but you cant get replacement batteries anywhere which also means I wasted my money buying those. Most if the batteries are flat. later I went to Dischem there so stopped at Builders. The lady checked the system and said I could go fetch one. I couldnt find white, only a lot of pink, purple and green. Nobody in sight to help. Asked around but no luck. The front desk said she’d call someone. Waited and waited. She called again. Still nobody came. She then called someone else. He wasnt sure about what I wanted but then the right guy came along. He didnt think they had. Told him computer shows. Eventually he came with a box full, dusty and looking old!!! He said they had no space to pack them out!!! I’d now wasted at least 20 mins there. They then said I cant exchange I need to refund and repurchase. But oh the price differs. Yes I bought it on promo. Well only if you bring it back while still on promo its the same price, otherwise you need to pay in the difference. Really??? 1. I only bought it because it was on special. 2. Its not my fault it broke after the promo. 3. How can you expect me to now pay full price because of bad quality? If I wanted to pay R99 I wouldn’t have waited for it to go on promo. Manager offered 10%. What a joke. I’ve now wasted petrol to 2 stores, all my time due to poor service in both stores and now I must pay in R29? I refuse. The Manager took my number and would see what he can do. That was Fri 3/1. Still waiting. China Malls lights are cheaper and last for years. Thought Builders would sell better quality and give better service. I still cant believe a R99 item doesnt last 2 months yet I must pay in to exchange it!! Shocked and disgusted. Time, petrol snd my money wasted on this item. Now I know why I’ve always preferred Chamberlains!!!