Vox is so terrible

Vox is so terrible that even 1 star is being generous, was a new customer wanted a simcard with unlimited data to replace the one i currently had with Rain, they see i am a new customer they do not inform me that the sim card can only work on their devices as i was informed that i will be paying R550+-, the sim card was delivered however the sim card was not working tried to contact them for 2 days without help then eventually reached someone who advised that i should rent a wifi from them and an additional +-200 to be added, within 7 days i cancelled the request, however they say i am liable to the 500 cost, 500 for the sim card that does not work that i could have purchased at a nearest store, been called by a debt collector saying i am liable for the fee on a service i never received at all, this is day light *******, and they definitely ignore the consumer act, as i had canceled their services within 7days as i was not receiving the service i required, 550 for the simcard no thank you, which encurrured interest i must add ridiculous.