Experiences... they used to come banging on the door every six months telling me that I had cable.
They deactivated the cable on my request when I moved in, so why they thought I should still have cable remains a mystery.
They then threatened legal action, because the "receiving of cable TV signals was illegal according to paragraph x line y section z of the BGB"... So much for easy cancellation

I politely told them in writing that reception of
satellite TV was not illegal, and it was much better value for money than what they offer. I also told them that if they ever bang on my door again I would take them to court for continued harassment.
Problem solved.