Refund

I bought a WiFi device @ Telkom shop which cost me R2799 I was told to take the device back to the shop within 7 days is am not happy with the operation of a device Yes I found that the device were too expensive to use that to buy This device cost me R650 for 3 hours of usage On 5th day I decided to take the device back to the shop due to misbehaving of it. When I get to the shop to return the device they told me to wait for approval if the device need to be returned or not. They took my details and promised to call me with didn’t happen. I went back to the shop to ask em about a call and approval,they told me I still need to wait. Then I ask then to keep the divide by them they refused for the second time.out of anger, I decided to leave the device by them and walk out the shop. My problem is if it’s 7day rule there’s no question to be asked within the period. All I know is they should look at a device see if there any harm to it test it and see if Iits in working condition. So I feel like they don’t wana pay the money back

I need your help It’s zack silver mc dad others know me as hush I bought this device from Telkom shop in cavendish Claremont Cape Town. Thank you.