no issue ceasing my payments with Salliemae

Each month I have $209.85 automatically withdrawn by my checking account. Depending on the day of the week, it is taken out on the 27th-29th. I called on Tuesday, November 27th to see when the auto-withdrawel would fall on because I wanted to move the date to Friday, November 30th so I would have the proper funds in the account (my check arrived late and by the time it would process/clear it would be that date). I was told that I had no payment due in that amount until December 27th. However, on Friday, November 30th I saw that $209.85 was taken out of my account on November 29th, which resulted in insufficient funds fees totaling $140. I contacted Salliemae on November 30th and was told that if I provide a copy of my bank statement, Salliemae would cover the insufficient funds fee of $140 and that it would be back in my account by the following week. I followed up on Monday, December 3rd to check on the status and was told it wasn’t processed, which makes sense because over the weekend. I followed upon Tuesday, December 4th and was told it would take 7-14 days for my money to be electronically transferred back into my account. This conflicts with what I was told on November 30th. I called back later that afternoon to try to resolve the issue and the woman I spoke with said that it was being processed and it should be in my bank account within the next 24 hours. I decided to wait until today, Thursday, December 6th to follow up seeing that no money has been refunded back into my account. I was told today that it wasn’t processed and it would take 7 days for it to be electronically refunded back in my account. Obviously upset with this misinformation and miscommunication, I posted the issue on Sallie Mae’s Facebook wall and direct messaged the Facebook page on Thursday, December 6th. I received a prompt response asking for my account number and telephone number and was told that Trish would contact me. Trish contacted me in the afternoon and appeared to be very helpful and eager to resolve the issue. She said that she listened to the original call and agreed that there was a miscommunication and that my issue should never have happened. She said that they would make this a priority and that the funds would be electronically returned within 24 hours. I followed up Friday, December 7th with a phone message inquiring about the status, and then called again two additional times with no one picking up the line. Finally Trish emailed me and said that the funds were transferred to the bank and they cannot provide at timeline of when the funds will clear. She provided no documentation that the funds were actually transferred, so basically I have to rely upon her word. I checked my bank account this morning and there is no refund/no activity pending. I find this all absurd because it took one day to mess up my bank account but a week to fix the damage? I believe this issue should be expedited because I have no issue ceasing my payments with Salliemae. As always, Salliemae shows me why I should have never done business with them to begin with.