Capital One Credit Card Complaint

Capital One Credit card department,

Transaction issue Connecticut

The available credit on my account with Capital One is down from over - available from yesterday to only - today, -/-/-. The attached screen shot shows all transactions both posted and pending, they still do not add up to show difference in available credit. Despite chatting with - different chat reps, both slow/inept with bad English, I am unable to figure out the difference from having over - available yesterday to - today. The reason I am concerned among others is because I had a transaction get declined from - due to low available credit. Also, there appears to be some transaction ( s ) which are not showing as posted or even pending which is cause of the problem. The attached screen shot from today shows all items posted and pending, do not account for difference in available credit