"It's not debt, it's a card"
There's a word that's been kept out of this so far, and you've been keeping it out too. Debt. Debt is what other people have. Loans, arrears, the letters in red. You've got a card with a balance on it, which is a different thing.
It isn't. A card balance is unsecured debt at one of the highest interest rates an ordinary person is ever charged. It's a loan from a bank, repayable with interest, and the only differences from the loans you'd call debt are that it has no end date, it can grow as you use it, and it's been given a name that doesn't sound like borrowing. "Balance" is a word for what's in an account. Your card doesn't have a balance in that sense. It has a debt, and the word balance is doing the same work as the green number, which is to make the owing feel like having.
The word matters because words decide what gets dealt with. A person with four thousand pounds of debt at twenty per cent has a problem to solve, and knows it, and solves it. A person with a balance on a card has a card, and cards are normal, and nothing needs solving. Same four thousand pounds. Same twenty per cent. Different word, and the word has kept the problem out of the category of problems for a decade.
StepChange's page on the subject is called credit card debt, and it uses the word throughout, and it describes people who come to them having carried a balance for years without thinking of it as debt until the letter about persistent debt arrived and used the word for them. You don't need to wait for the letter. The word is available now, and using it is the first thing that changes how you look at the sheet.
Say it once, plainly. I have four thousand pounds of debt. Not as a confession, because there's nothing to confess, and eighteen million people have some. As a description, because it's accurate, and accurate descriptions are what problems get solved from. The card is a card. What's on it is debt, and debt is a thing people clear.