Scotia Bank Trust request for extra payment

I paid the trust in the spring for 2024. They charged my credit card twice. When I asked them why, they said it was for 2023. I sent copies of paid trust for 2023 and waited forever for her to reply to me. I told her they double charged me and wanted a refund. She said they would apply it to 2025. I asked for confirmation of this and never got it after several attempts. I kept her emails if she tries to charge me again for 2025. Poorly run!!