Request for Wi-Fi cancelation

On the mid of June 2023 i called the call center of Dstv enquiring about their internet. They promised to get a sales representative dealing with internet to call me back, of course the representative did call me back and explained to me how it's going to work. I agreed with the rep that I take the internet. They did send me the WiFi router and it was delivered on the 26th of June 2023. After receiving the WiFi router I called call center to assist me with logging into the Wi-Fi network. But they failed to assist me with logging into Wi-Fi and they promised to escalate me my request to someone who was going to assist me logging into. But still they failed to assist me with the password to login, cause the password on the device wasn't working. After a week of not getting assist with internet, I called Dstv call center to cancel the service, because it was not serving the purpose. They promised to book courier service to come to collect the device. But they never came and called the call center and to find from the call center agent i was speaking to, there was no booking of courier service. The call center agent promised again to make a courier booking, but it never came to collect. I called the call center again to find out what was going on, and mind you now it's end of July 2023, I'm paying for something that I can't use. The call center advised to rather deliver it myself to nearest Dstv outlet, of which I went to two outlet, but they refused to take back the device. They told me to take it to Randburg office, of which I went to on 18th August 2023. When I arrived there and explained to representative that i brought their internet device so that they can cancel the service, the representative told me to take back the device with me, they will book the collection and courier will come to my address to fetch the device and then will be able to cancel the service. I told the representative that I am not taking back the device with me, cause it seems like everyone is just sending me from pillar to post. And I was tired of the entire experience and I asked if I could speak to supervisor. I given a chance to speak with the supervisor, whom took time to listen to my recorded calls when I called the call center, and interrogated me, of which I did not like, because I was there to cancel the service of which is not canceled even though I requested it. I am paying for the service I am not using. ???