@Kacper-Kacper2 I believe you can edit the means of your payment in your customer account at Magix.com.
If a loops unlimited subscription is running you can cancel it, you should be able to cancel it in the Welcome Screen inside Music Maker or via an e-mail to sales support at infoservice@magix.net.
Vegas pro. in my magix account, the only registered product is vegas pro 15 from 2018. I'm afraid I gave the wrong e-mail address and I have no way to cancel :/