Online upgrading!! Utterly Useless!

So once again I was proven that Vodacom's online upgrading department is a ****! This is the second time I've tried upgrading online with the promise that I will be called back. I've requested the upgrade the 1st time on the 18/11/2017. Received a call back on the 19/11/2017. Surprise surprise, they can see the deal price on the website but their pricing system does not allow this price. Ok, problems been escalated and they will get back to me the next day! Yeah right, I am still waiting for that call. Come black friday I see that the deal is still active, so I re-requested the upgrade. Once again 24hrs comes and goes no calls. Ok, lets talk to Vodacom online. Wow spoken to Natalie, she promised she will call me. What a surprise, no call. Wait a day or two, talk to Vodacom online again. Spoke to Austin, promised a call back. Guess what, still no call back. So eventually I called Vodacom today. Sorry mam, the deal is no longer active. Who's fault is that? Twice I requested the upgrade, twice no one gets back to me! I am starting to think Vodacom's online deals is just a ****! What's the use of giving your customers upgarde reference numbers if you aren't planning to assist them. This is the second time I've had the exact same experience with Vodacom online upgrades. I don't know why I still bother upgrading at all!! The people working there does not care about any customer service or anything. Don't think you can talk to a manager Vodacom because Vodacom's managers does not take calls. What's the use having managers at all then?