30% Discount actually an upgrade

I was called in October 2017 and informed that I will be receiving a discount of 30% on my contract payment. This morning I tried to upgrade my contract, only to find out that this "discount" was in fact logged as an upgrade. Now I am only able to upgrade in 2019. If I want a new phone, I need to get another line. Best part : If I want to cancel my contract, I will have to pay a penalty fee. I would like to request the recording of where I was informed that this was in fact what the "discount"was all about.