Inconsistent information given by the bank

I had my debit order return unsuccessful, while I had sufficient amount in my account. I requested a chat and an agent by the name of Palesa tells me I had insufficient funds when the debit order went through then closes chat on me immediately after telling me that.

I requested another chat and the same agent that closed the chat on me, still maintains that I had insufficient funds. When I ask her at what point did I not have enough funds on the 26th of November, she tells me about transactions that took place on the 27th. She still couldn’t explain why I didn’t get notification about the debit order. She further tells me that the information about my account sent by incontact is delayed, but couldn’t explain why the running balance sent by incontact was never less than what the required debit order amount