No feedback on upgrade dispute

Vodacom Upgrade- In Jan a consultant phoned and said that my contract is due and I did the upgrade. I was sure my upgrade is much later in the year and I constantly asked her are you sure its Jan... because if Im going to pay for the old device Im not going to upgrade and she assured that there will not be any extra cost. So Jan Invoice everything was normal... Feb invoice received and there it was the double handset installment Then I phoned to log a call to escalate it so that I can listen to what I said and what she said to me when she phoned for the upgrade in Jan... this is 2 months and haven’t heard anything . I have been a client from vodacom for 10 year + and know how the upgrades works... but it is unacceptable for them to take this long for a query that was logged the 13 of Feb! I want this to be resolved as soon as possible because like I’ve said in all the previous calls I am not a very happy Client