Credit card or prepaid card — SANTANDER HOLDINGS USA, INC. (MA)

Card was charged for something you did not purchase with the card. On XX/XX/2022, someone used my card for a purchase of {$3800.00} from XXXX XXXX. I started a claim regarding this issue and was denied by Santander Bank. The bank won't give me the transaction details etc tracking number, name, phone number of the package. They only told me the merchant provided delivery confirmation but i never receive any package. Please help me resolve this issue.