UPGRADE FEES!!!!!!

Beginning of January 2018, my husband and I was perusing Vodacom's webpage to see which phone we could upgrade to as our upgrades was due +-18 January. While on the webpage, a pop-up chat opened up. and I was communicating with a lady that after asking a few questions said she would phone us to arrange the necessary detail for the upgrades. Which she immediately did. She arrange everything over the phone, I specificially asked what the monthly amounts would be and also if and what the admin/upgrade fee would. She advised that no fee other than the normal package fee would be payable. She also advised that as the new phones has nano sims they would be included in our package. No nano sims were received and we had to obtain them ourselves. No we receive our bill for March and hold and behold there is an upgrade/admin fee of R150 on each of the upgrades. I am really very upset as this fee was not mentioned and now we have to pay for it. Vodacom is really driving me up the wall.