VODACOM WHAT EXACTLY IS AN UPGRADE ?

@Vodacom what exactly is an UPGRADE ? kindly clarify as I am hugely disappointed with your treatment as of late. I have been getting non stop calls now for about a month or two regarding an upgrade on a current contract that I have.when I finally want to get this upgrade and THIS is the nonsensical customer service you provide. I start doing this upgrade process online as I want it done swiftly and for some reason physical branch’s around me do not have any iPhone 14 Plus on hand . During this process of upgrading it is approved online and I receive a call from Mbali wanting to verify all my details. She takes me on a tedious verification process only to let me know at the end of the call that I have to pay my current contract (2 months left) and the upgrade contract concurrently ? When has this ever been a thing for you @Vodacom as this is not my first upgrade with you or other networks for that matter, further your website states you can get an upgrade from 3months before it ends. According to me it means I will get the device and start paying the amount of the new contract not both . AM I WRONG ? explain to me exactly what an upgrade is as NO ONE would pay for 2 different contracts at the same time for the same number . If this is a new policy . Do not call us for upgrade until the contract is finished . If I could rate you 0 stars I would .