Request for Explanation on Termination of YouTube Premium

I recently discovered that my YouTube Premium membership, which I activated through Vodafone using my email address f***********@gmail.com, has unexpectedly ended. I reached out to Vodafone, but they informed me that they have no involvement in the termination of my subscription. I am left with no clear answer as to why my membership was abruptly canceled.

I am requesting a detailed explanation regarding why my YouTube Premium subscription ended, as I had no prior notice or reason to expect this outcome. I rely on this service regularly, so a prompt response and resolution would be greatly appreciated.