double billed

My first invoice from zoom was from april 2020 to april 2021 but then this month, January, I was billed for Jan 2022 to Jan 2023 so I've been billed for a few months twice.  I have tried emailing but it bounces back.  How can I get my account credited for the months where I have been billed twice.  I have had to pay to ensure that my service is not interrupted but it's frustrating that there is no way of reporting an error like this.  Wondering if anyone else has had this experience and if Zoom can correct it please...thanks!