Selldirect are ************ and **********!!!!!

Selldirect contacted me for an upgrade on my contract. I was at work at the time, I did not have my contract details with me, I did not know what my current package was. I asked the sales person what my current package is, the sales person promised me that the package she was offering to me was double the amount of data I was receiving at the moment for R 200 less. I accepted this deal, who wouldn't? The problem is the sales person ****, I only agreed to a package under false pretences. My current package is 300gig a month. The package I "agreed" to is 60 day time gigs and 60 night time gigs. I would never have taken this package had the salesperson told me the TRUTH. When the box arrived I opened it and tested the device (I used 3 different working simcards), the device does not work. I have emailed Randall Muller about the broken device he just completely ignores me. He insist that I have to pay R1733.00 for this device on 15/03/2019 in cash at once, or otherwise the package that I don't want will be activated. This is ******ion.