5/3 Bank Faulty Website IL

My second car was repossessed on November 15, 2016.  I make payments using the 5/3 Bank website.  Apparently, two payments for two different months were not made, causing a late payment of a total of 63 days.  Went on to the website, looked at the payment history, attempted to make payments on the months in question, but there is NO option to do so.  Most other websites have this feature where either the next payment due inlcudes a past payment quantity, or some notification on the "make a payment" page that says "past due amount ...".  

This is truly an amateur website that has cost me $1,843.00 plus storage fees for the amount of days until this is resolved.  The wait time to even speak to the Repo department at this bank was long, as apparentyly MANY people had their cars repossessed that day.

FIX your website to inlude PAST DUE information on the payment page!  Unless, of course, this is set up to make money on forgetful people.