Credit card — SYNCHRONY FINANCIAL (WA)

Other problem. My credit card had a negative balance from a refund. It had this negative balance for 4 months, from XXXX until XXXX while I didnt use the card for anything else. On XX/XX/XXXX, the credit card company charged me exactly {$90.00} which was the exact amount of the negative balance and they charged this as an adjustment. This money should be refunded to my bank account, which they have not provided any options or avenues for so they have tried to just take the money for themselves. I would like this money refunded to my bank account.