I received a letter from Santander Bank ( XXXX PA ) on XXXX/XXXX/15 stating that I had a balance of XXXX. I mailed them a check for XXXX which they received on XXXX. I called to ask how I could pay off the remaining loan. They told me that over the one month period that had added an additional 10 % in late fees to loan and now the balance had grown by {$500.00}. 
