Missing Store Credit Balance

I am writing once again regarding an unresolved issue with my store credit balance. The funds from my return did reflect, but at no point did I use or spend them. When I recently logged into my account, my balance showed zero, and I have no explanation or notification regarding this change. I have already attempted to contact your support team, but I have not received any response. This lack of communication is extremely disappointing and leaves me feeling that my concern is not being taken seriously. I urgently request the following: A full investigation into what happened to my store credit. A detailed statement of how and when the credit was supposedly used or removed. Restoration of my missing funds if no valid transaction was made by me. I expect transparent communication and prompt assistance, as this situation is both frustrating and unacceptable. I look forward to your immediate response.