1. The Promotional price plan (the ‘Service’) is available from Saturday 1 August 2015 at 00:01 until Sunday 31 July 2016 at 23:59
8. On this price plan you cannot make use of Power Hour, Chat for 20, Power Bundles, My5, Night Shift or Everyday Extra
14. No refunds will be allowed for any dropped calls due to network congestion.
15.1 If the SIM card is used in a fixed location device to regularly make and receive calls to multiple numbers, the Service will be suspended immediately, pending an investigation.
16. Vodacom reserves the right to limit the Service in regions or areas where there is limited network capacity (high congestion) in order to maintain consistent quality of service.
17. Vodacom reserves the right to alter or terminate the Service in order to prevent catastrophic impact on the network.
17 is worded in every t&c I've seen on all networks