Capital One Credit Card Complaint

Capital One Credit card department,

Advertising and marketing California

I over paid my capital one card. As part of a home refi they asked me to pay off and close this account. I looked up online my total balance and paid a direct payment through their website for around $1500.00 in - 2016. I asked them to close the account, they did. A few days later, another payment for $950.00 was paid auto bill pay from my checking account. I forgot to cancel that check that I had scheduled. When I noticed the $950.00 come out of the account I called Capital One. They said they did n't have any record of it. Then we did a three way conference call and Capital One and - and I al talked. They said they would start an investigation. Nothing happened, I called a few weeks later, they said they would start and investigation, nothing happened. NOW, they are charging a NEGATIVE $ - and my credit card shows I owe it???? They have been impossible to work with. This account has been closed and they owe me - not the other way around and they just added a late fee. Its nuts.