Well i’m from Germany. You can’t just stop paying and they can’t force you to listen to their pleas.

A simple informal email is enough to cancel most anything.

You can always get back money that was withdrawn from your bank account (probably a SEPA thing) and as long as payments are in dispute (you have to disagree with wrong invoices in writing) they can’t charge you extra.

I tried random numbers and internet numbers with Openai, Wolt and Revolut.

They were all rejected

Snowden for example

Also have you never heard of data brokers?

This is not possible.

Most services that require a phone number also verify it via sms.

Additionally they check so that each number can only be used once, disabling most free sms receivers online.