YouTube Premium Subscription Termination Issue

I started a YouTube Premium subscription with my Vodafone line number 0544****970. After using it for about 3 months, I noticed that my subscription had terminated on its own. Neither YouTube nor Vodafone acknowledges this situation. I had previously experienced the same thing with another Vodafone line, number 0544****970. After 2-3 months, my YouTube Premium subscription ended on its own. Since I couldn't continue no matter what I did, I started using it by subscribing to my other line. But it happened the same way. There is a systematic deterrence or cancellation situation. We have neither a place to say nor a place to ask. I called Vodafone customer service, and they couldn't do anything. So who should I ask? When it comes to getting it, you get it, but when you don't do your duty/job, there is no place to ask even one. They called Vodafone customer service, and I learned once again that it was not their fault. So who will follow this situation? No one, of course... I should have contacted YouTube. Whether it gets better or not, I guess you shouldn't buy a YouTube Premium subscription with Vodafone. I wanted to share it in case anyone pays attention so that it doesn't drag on later. Are we going to say that the huge YouTube cannot maintain a single membership?