Fell behind in paying my storage, how can i prevent them auctioning my stuff. Need legal help, late fees doubled my balance.

I fell behind in paying my storage, but when i phoned to ask for the total, i was shocked to learn that it nearly doubled what i owe originally. I know that they cannot assess over 15% of my rental dues per month, which is 240. I could have paid them 552 total, but my bill is 855, and they said its scheduled for auction on monday, 5/3. I checked CA sec. Of state and county recorders office to see if a UCC or a mechanical lien was filed under my name, nor can i fibd any publications showing an auction of my belongings. How can i prevent them from auctioning my property or how can i regain access so i can get some of my things that i can sell to pay them? Please help.