Capital One Credit Card Complaint

Capital One Credit card department,

Delinquent account New Hampshire

I paid my CC bill like always. My statements were begin sent to my junk my. My payment was always $25.00 so thats what I was paying. I received a credit alert from my credit monitoring service stating I was 30 days late on a payment. I was shocked. I quickly logged on and paid what I needed to pay to get to current status. I never received any notification about my account until the alert. Why would I get notification when I paid the bill? I 've tried contacting them multiple times and they state there is nothing they can do. Which I know is not true. I have been a member since 2008 and have never missed a payment. I also sent them a goodwill letter, again no response. I followed up with a call, again they claim there is nothing they can do. For 1 " so called '' late payment that did not actually occur. They have made - of dollars off me and I have never missed one payment.