Utter poor customer service

On the first of February I contacted Vodacom to cancel my data contract as I was able to find a much better deal than I had with another provider. The advisor then convinced me to take another deal with more data at an acceptable rate. They were supposed to deliver a data device to me. When this did not happen I phoned in and the second advisor said the deal the first advisor offered me has expired, he then offered me another deal which also sounded acceptable, he just said he needed to cancel the first deal and will get back to me which he never did. Today I spoke to a third advisor who said she mailed the first advisor to complete the original deal, I have not heard anything. This is utter poor service, Vodacom must either have the new deal started on the 1 March or my account with them must be closed 28 February. They can arrange with an outlet near me to collect the device.