Claimed items from league bank

I am new to overdrive and I joined a league for the first time. For my first voucher from the bank I chose the 70 rs credits because it sounded like a really good deal. Instead of redeeming when I chose it it is just sitting in my inventory. When I try to exchange it it only offered me 3 instead of 70. After waiting on a half hour call only to be told to call back the next day I am now upset because that didn't resolve it either. They instructed me to post here so that is what I've done.