Allow *****ulent merchants on marketplace

OEM's set their devices to not accept 3rd party consumables. Canon / Hp printer cartridges. Why does Takealot allow these product on their site conveniently putting non-refundable at the bottom of the list. I am disabled and rely on online market places, but with the digital ***** and *******ion in plain site my little disability pension is ****** transaction by transaction.

Where do we find trusted companies now a days?