Late payment fee

Hi, recently, I had a late payment due to my mobile plan, not drawing out of my bank account for some unknown reason. When I noticed that I had a late payment, I immediately went and paid as well as paid the late fee. Today I get a notification from my bank that I have been charged another late fee…. My next bill is not even due until September and I paid my bill and that late payment fee two weeks ago, so I want to dispute this second late fee charge that came out of nowhere and seems to be for no reason at all.