HORRIBLE

I cancelled this service before they even delivered the device. Then I had to call them back to advise they need to collect the device because I've already cancelled. A day later they collected the device,which was I done within the 7 day cooling off period. The device was still in its original package when courier collected. Never been opened or switched on! Today I receive an email with a invoice of R300. What the hell am I being billed for ?? I will take this further with CPA !!