Vodacom online upgrade facility

On the 6th February 2020 I ordered a promo deal for the HP 14 AMD + HUAWEI R218H LTE @R199 package from vodacom online services as part of my upgrade, which has been due since November 2019. I was then sent proof of upgrade offer and was under the impression that everything is in order.Today 10 Feb 2020 I called their online store to check on my order and delivery expectation date. I was then told that the order has been cancelled from their side,due to an error that happened on their side and the system did not re submit the application I had sent nor did I receive any notification about this.

The call center agent then told me that the deal is now available for only 2GB as opposed to 10GB that was offered on the deal I had ordered. I am unable to understand how this is suppose to work. Why have an online upgrade facility if customers still have to call in to check if their orders went through. And I dont understand why I have to be disadvantaged and get a different deal to what the promo was if the error was on vodacom side.

At this point I would rather cancel the upgrade then if the order I had submitted for the 10Gb deal can not be processed. I am really disappointed at this treatment received. Their call center for the online shop also has the longest queue. I was holding for about 30min before I could get assistance.