Citibank Bank Account Or Service Complaint

Citibank Bank account or service department,

Other bank product/service Making/receiving payments, sending money California

A reversal of credit was posted to my account without my permission. I bought items from a vendor, the products received was only partial quantity. ie : - pieces of an item and I received - pieces and - pieces of an inferior product. I disputed this issue with the vendor and vendor would only refund if I sent back the inferior product at my own expense. Doing so would only decrease my refund substantially, when I DID NOT order the inferior product in the first place. Their mistake and I should not pay. One later, Credit Card company reversed the credit and charged me the full amount of $550.00. After - letters to Credit Card Company, this issue has not been resolved and I am advised I have no other recourse.