So much for "upgrading"!!!!!!!!!

On 25 July I was contacted by a Vodacom sales representative to upgrade my data package. I was informed I would be getting the same amount of data, for R20 less and a free tablet that they would deliver for R69 p/m. I agreed and received a SMS confirming my order and upgrade. A few days later I received a call from courier company confirming my delivery address and was advised that I would receive my tablet the next day. No phone calls and no delivery. When I contacted Vodacom the following week, I was told there was a "delivery fail" and that the tablet had been sent back to warehouse and that I must wait a week to cancel the contract. Why if the tablet was sent to warehouse and they know they have not fulfilled their part of the contract must I now still cancel, and why was no effort made to resend the tablet? I also paid an extra R150 upgrade fee with my July pmt d/d 30.07.2018 as I was informed there would be an upgrade charge of R150. I phoned Vodacom this morning to again reverse my upgrade and cancel contract as I would like to go in store to do a new upgrade and 21 minutes later on the phone to 3 consultants, I still do not even know if this instruction has been actioned. In the meantime, I am constantly being bugged by Vodacom reps trying to sell me additional contracts yet the one that I agreed to they can not fulfil. Stop wasting my time, reverse my upgrade status, cancel my contract and refund my R150 that I paid for nothing!!! Your customer care is pathetic!!!!