I bought adobe plan with 24,79 € per month and I realised that adobe charges me 37,19 € more with the rationale adobe stock but I didn’t buy this plan and I haven’t use it. I immediately cancelled it and it charged me a big amount of money as a fee. Please help! I need a refund.
You took the stock subscription together with your other plan, by ticking a convenient radio button. It's unticked by default. You should never ask for more than you want to get. If you do, read the conditions…
Contact Adobe customer care and see if there is a solution to your problem. Adobe customer care can be contacted by beginning a secure chat session at https://helpx.adobe.com/contact.html?rghtup=autoOpen. Pop-up blockers need to be disabled, you need to accept cookies! If the chat window fails to open, or is non-responsive, use a different device and/or browser to start the interaction.
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For support via Twitter:
(see also here: https://community.adobe.com/t5/creative-cloud-services/how-to-contact-adobe-support/td-p/11875703 or here
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If in doubt, ask the forum.