Customer Service

I have received a sms yesterday regarding an upgrade which I don’t want at all. I am trying to cut my expenses and now this. A lady called me a week ago saying something about data being added and the amount that I pay every month being reduced and I never thought it was an upgrade. I really cannot afford an upgrade since my plan is not to have any contracts anymore. If she was clear and said to me it was an upgrade I would have said no thank you. I guess there was a misunderstanding but I don’t need this since I am trying to pay off my debts. I really need someone to sort this out for me please.