Non-existent customer care at Vodacom

Took out a contract online with Vodacom in June. First invoice came and was billed for the contract and delivery fee. 2nd invoice came and was billed for the contract and delivery fee again. Tried to contact customer care for this but can't get through instead I'm redirected to the bot. Tried using Tobi and it keeps telling me an agent will contact me and no one has since July. Called collections too but they can't even help cause all they can see is total you have to pay not the actual invoice. Earlier this month I received double the airtime I'm supposed to receive, yet I still can't get through to their customer care and I'm now double billed. I really don't know why they have a customer care service if it's non-existent in practice. They're very quick to call when you're applying for a contract but nowhere to be found when you have a problem.