Why Vodacom?

So I have been a loyal customer of vodacom for about 11 years my family even longer. 3 years back I took the 400GB+400GB for R399 special during their black friday month. So now this month my 3 years will be up so it's time to upgrade but yet as I was in the process of looking at their deals and special decind which deal I want I discovered my bill went up with R1200. When calling your accounts department and then being told they can't help me I must phone customer care I get informed that my contract come to term on the 5th of November and now all my discounts fell away and is now expected to pay full price. When telling the consultant over the phone but look I pay my bill on the 1st for the new month and this is the black friday month which means I should of had the whole November to upgrade so why already was it canceled and expected to pay full price when I paid already for the new month and I was meant to have the whole month to upgrade and this is nonsens they must sort it out and fix my bill. The only thing they could tell me was that they will call me back. That was last week friday. We are now on monday and yet no one called me back. Also went to a vodacom store where the consultant also admitted but this should not have happened and that technically I should of had the whole month to upgrade before my discounts fell away. Logged a service request for me which he now informed me today was by retentions and yet still nothing is being fixed and I am expected to pay R1200 extra on my bill month end. I was thinking of taking the 1TB special for R429 but now I'm thinking of canceling. Is this how vodacom treats their customers? What about all the other customers who will come black friday only to get a shock on their bills. Instead of upgrades and a good black friday you will only then sit with cancelations. I already consultanted a lawyer who said that this is ******* and vodacom has no right to increase my bill till end of November. Giving me time to upgrade to the new black friday special since this last deal was done in November as a black friday deal. If vodacom is going to try and take that money from me and my bill does not get fixed. Not only will I sue vodacom but myself and my familie who all have contracts will cancel all ours but I will also gladly post this all over social media that all those customers who took that deal can see what you are doing and you can then deal with thousands of customers at your door step fighting. Sort my bill vodacom and I will gladly upgrade. All I want is for my account and this mistake to be fixed.