I can use tokens that I have not purchased

hello everyone, something strange is happening with my account and i need your help. I have always paid APo 25$ for the account. Now it has been switched to tokens. Ok, good. I’m not a fan of it, I bought 5K tokens. Now when I register in my account, I don’t see these tokens. Also I can’t use ChatGPT 4. And all GPTs have disappeared. Why? Does anyone know?