We'll take your money, but......

How is it that a phone supplier like Vodacom, can sell you a phone in April 2018, and in August 2019 tell you it is redundant. So they no longer keep screen protectors, or anything, for it. Hello, my contract has another 8 months to go. Can I then make my payments redundant too? Imagine buying a car and 16 months after purchase no longer being able to get anything for it? Went to Vodaworld, which is HQ. Went to Cresta, where they told me, sorry, we no longer keep stuff for your phone as it is discontinued. You,, Vodacom, are ripping us off.....