LBS Financial Credit Union review: Employee

I received my statement for October and noticed it stated September was not paid for this stating my past payment was late and inputted a late fee. I paid September (have screen shot of my account and it indicates as completed). I called the call center to address the issue. Amber answered and when I explained to her what happened, she still proceeded to state on her end it says the bank returned it. Although on my end the payment shows as completed. Amber kept stating check your bank check you bank, although I advised I did a few times . I would take responsibility if it was on my end. Amber then stated she could ask her supervisor to “possibly” waive the fee but after the fact both September and October were paid. I scoffed and said ok. Rather than being collective on her end knowing a customer is frustrated, Amber proceeded to snap at me. “What did you mean by that? Did you not want me to ask my boss?” What kind of customer service is that? I’m the one who had to reply calm and collective although I was never notified from LBS that my payment was pulled? Seems unfair, especially if I look at my account it says COMPLETED ON 9/28.