Netflix 30 day trial - Why is the address and bank details on the button Start paid membership?

I pressed it, I hope that they won't suck the plasticine from my account because they said at the beginning that I could quit shortly before.

If you have already registered with Netflix with the data, there's no longer a trial period and you have to pay directly.

No there was 30 days free of charge

You have, so to speak, started a contract with netflix if you do not cancel before the 30 days end, you will continue to withdraw money so everything is good as long as you cancel beforehand