Pvz heroes lost cards

I logged back in after roughly a year to give the game another shot and found my Brain Freeze deck missing nearly half of its cards. Turns out, they're just gone! For example, I had 4/4 Gourmet cheese cutter zombies, an octo zombie, some overstuffed zombies, ect. and they just went *poof*... 

What can I even do to get this fixed without remembering the exact card layout I had..?