dishonest service by Vodacom

In February 2016 I received an sms from Vodacom that i qualify for an upgrade. I clicked on the Vodacom website for a call back. Then received a call soon afterwards. I asked the Vodacom Agent if i can upgrade even though my current contract (left with 3 payment) is still in force. She answered oh yes, without explaining that i will have to pay for 2 handsets. Now Vodacom is playing hide and seek regarding the release of the voice recording. There was no need for me to upgrade before time, as i have never done that in the past. Voda lured me into a trap. I need recording because i am sure I did ask the right question.