Bad experience

I bought a rechargeble light and lost my slip and I didn't use it even once. I went to Game thinking that may they will exchange the light since it's their product. I must say the experience that I got there wasn't nice at all. The lady at the customer service was rude when I told her that I lost my slip, she told me about supporting documents being wanted, she doesn't want a warning and I understood that but her approach wasn't nice. I asked her if there was no any other procedure, her response was "that procedure you have to think it by yourself". She took a pen and paper and gave it to me without any explanation, I asked her what I should write and It was as if I'm annoying her. She said your cell number and barcode and I don't know what was she talking about and I had to ask her again. I ended up getting it by myself and when I asked her if this is the barcode she said maybe and kept quiet. She made a call and said they will call me. I asked her if that means I should leave. She left me there like a mad person pointing at the paper that I wrote my details on, saying I'm going to put this at the sales manager's office. She came back as I browsing at the shop saying she forget to take my card number and again I didn't know what was she talking about. When I showed her my card and asked to show me what I should write, she said she also doesn't know. I told her that I will give them the card number when they give me a call since we both don't know what a card number is. She told me that she doesn't her blood pressure raised up just because I didn't write what they wanted. I just wrote what I think was right. I still haven't received the call till today I went there on the 29th of November and today it's the 1st of December. I'm still stuck with a light that it's not working, I'm using light of a phone but I bought a light to avoid using a phone when there is loadshedding and at game they didn't even try to assist me but they made me feel like a useless person running around the shop.