But what would actually happen in Germany is, you would be stuck to that service due to a 3 year contract. Which you have to cancel some three months in advance or it renews for next three years.

But hey, we get startups whose usp is cancelling services.

Seems pretty normal to everyone I complain, that I still pay for my O2 bill after sending the cancellation letter(Physical piece of paper) for the umpteenth time.

Never heard of three year contracts. It's been a long time since I signed any two year contract. Most contracts I have (Internet, Gas, Energy, ..) are annual contracts. My mobile contract is cancelable monthly.