MTN charging me a cancelation fee for a product that arrived not working

I purchased my mtn home router online and paid on the 28th of June 2024. The router was delivered to me on the 2nd of July 2024. After a week of calling back and forth between MTN and DSV my simcard is still not activated. I call mtn to cancel my contract and I am told that I must take my router to a mtn store and if I don't I will be charged a cancelation fee. I bought the router online because I don't want the hustle of having to go to the store. It's - 4 degrees outside and I am expected to travel 30km to return the router because they don't want to come pick it up and want to charge me a cancelation fee for a product that is not working.