Poor service from Vodacom store manager and personnel

I took a router on the 8th of August 2024 at Vaal Mall Vodacom store and it had issues connecting to the internet, so I returned it to the store on the 13th of August 2024 to cancel it as I didn't want it any more. I am also working at the same Mall at a different store, one of the Vodacom consultants came to my workplace to give me the router saying that they activated the router and that it cannot be canceled as I signed a contract. I called Vodacom customer care and they advised that I should go back to the store and ask them to explain the return/cool off period, I did return on the 14th but they still refused to assist me and said I should call the cancelation department. I called the cancelation department on the 15th and talked to 3 different consultants who indicated that I'm still with in the cool off period and I should go back to the store so that they can assist me with cancelation. I went to the store again on the 15th but they refused to take the router and assist with cancelation, when I requested for the store manager to give me her name she refused and said it is not important for me to know her name.