Vodacom - Pathetic after sales service

Vodacom recently contacted me to sell me a promotion for a 60 Gig Data bundle promotion in which I will get 60Gigs of Data at the same rate as my current 10Gig contract. They said that they have noticed that I have been with Vodacom for years and that they would like to reward me with this special promotion. However, when the router device arrived, I noticed that I was signed up for a 5 Gig plan - and what's more, is that it is costing me the same as my 10Gig plan. When I phoned the contact centre - they are absolutely terrible - the lady just told me to then cancel the contract. They then offered to give me this plan for double the rate that was initially offered to me. I am going to cancel my other contracts with Vodacom as well since they are absolutely pathetic!