EA Play Pro Annual Pass Billing Issue

Hey guys,

I decided to opt for EA Play pro annual in the beginning of this month. I was using it monthly and I did this change in 3rd of December. I got charged for the monthly EA Play payment for the month of December and I will be billed 1st of January for the EA Play Pro Annual Pass. However, I knew that it would be more expensive so that is why I opted it in December when it was relatively cheaper. I figured I will be billed as soon as I made the change and my annual pass will start in 1st of January and I wont be billed for monthly charge anymore. Is it possible for me to pay the EA Play Annual Pass price as it was in the day I decided to order it or will I have to pay the price (how much it is) is the 1st of January, which is my next billing date? I feel like its unfair for me to pay expensive price because I agreed upon the initial price which was on 3rd of December. Maybe if it got much more expensive I wanted to opt out. I dont know if there is any clause in their agreement regarding this but still seems unfair to me. Any help? Thanks.