Pillar to post - customer service is the pits

Hi there - I added a new line (Home Internet 100Mbps Fair Usage Policy of 2TB* + Alcatel HH72 Router) to my account during the Black Friday specials @ R499 x 36 months (after checking the signal in my area on Vodacom's website).

The sim card and device were both delivered to me and during the last two weeks the speed is never higher than 30Mbps - so why am I paying R499 x 36 months for 100Mpbs when I should rather migrate to R399 x 36 months for 50 Mbps.

So I called online assistance on ***4 and spoke to someone. I was told they cannot assist me (and that the Black Friday deals are over - which they are NOT, because I just checked your website today (3 December at 12h52 - https://www.vodacom.co.za/shopping/deal-details-page/DV3K07DAAH?contractSkus=DV3K07DAAB&contractSkus=DV3K07DAAH) and the deals are still there. The person then transferred me to After Sales. After Sales told me directly that I had called the right place in the first place and that the online team do not want to deal with my query and advised me to call ***4 on Monday (4 December) and ask to speak to a supervisor.

This is actually unacceptable. The deals are still live and I want to be migrated to a lower speed on the new contract I just took out. Can someone urgently contact me to sort this out, please??