MATHEMAGICS NOT MAGICAL AT ALL!

I am only giving 1 star as there is no option to give a big ZERO! I purchased the product in December 2019 and installed in January. The USB was faulty so I tried explaining to the (un)support consultant that called me. After running through the installation with me, she confirmed that (as per the screen print I provided) that the USB THEY provided was indeed faulty. She then sends me an address to which I need to post THEIR faulty software so they can replace it. I don't see why I need to pay for the broken software when I haven't used it yet and then also pay courier fees for them to replace THEIR faulty software! Can someone please advise how I cancel this?