Sallie Mae, took a scheduled payment out on the wrong day, I called and let them know. They looked back to the phone call where I scheduled the payment initially. They acknowleged they were in the wrong. Refunded me my payment ( which took over a month to get back as a check in mail ) Then apologized and said they 'd make a " case '' with customer service to bring my account up to date and just move forward with my auto debit payments. 4 Months later I start recieving multiple phone calls a day collecting for the payment they assured would be resolved. 
I told them to look at their contact records and notes on my account. Surely they 'd see that they told me theyd resolve the issue. The costumer service rep agreed that theyd told me prior that theyd attempt to fix the issue but that it wasnt guarantied. I was upset and told them I wasnt going to pay 4 months later for their mistake and that they can continue to auto debit from my account. Now one of my loans shows past due each month because of that payment. Now theyre calling my cosigner ( Grandparents ) every hour on the hour 7 days a week till late in the evening. It 's borderline harassment. 
