My old mixer pack is gone after update

1 day after updating the app to the newer version, my data and minutes pack got reset to 0. I'm very annoyed. I bought the 30 day bundle package about few days ago for around 500 taka and all is gone. Had about 36+ GB and 300+ minutes. I will go to the main GP office if I don't get any help from here. 
Adding to the post, the app was already bad now it's even worse now.