When I insured a car in Germany, a letter diarrhea followed. "pay this amount", "pay an updated amount", "your insurance will be cancelled as the payment is due

When I insured a car in Germany, a letter diarrhea followed. "pay this amount", "pay an updated amount", "your insurance will be cancelled as the payment is due", "an another random data request and a threat, just in case", "some elaborate letter without any action point". Learned multiple times the "bullying someone through an incompetence".