Vodacom charging me triple my contract fee and device is not even delivered yet!

On Friday 23rd July I app**** for a contract online, Huawei P40 lite Sakura Pink, comes with headphones + Bluetooth speaker for R199 x 36 months. On Saturday 24th July, I received an email to say my application was approved. On Sunday 25th July, I received an SMS to say that Vodacom is awaiting approval and will contact me within the next 72 hours. Monday 26th July, a Vodacom consultant calls me to confirm all details and to confirm my delivery address etc. Right after the call drops, I received an SMS from my bank to accept a debit order from Vodacom. The debit order amount was for R600 and needed to be confirmed within the next 24 hours! Now, if my contract is only R199, where does the amount of R600 come from? Also, Vodacom terms and conditions states that I will be billed with a pro rata rate from the date my device is activated! Which won't even amount to R600! Activation and delivery is free ..so how ? Also whenever I try to chat online with agents regarding this, they pretend to be responding to me and end the chat! Im not even your customer yet Vodacom and I'm already having issues ...Vodacom used to be one of the best service providers when I was a kid ..but now, I'm thinking of cancelling this contract before it even arrives, on that note, there isn't even stock of this device!