Ergo insurance cancels my contract.

Hello people, Today I received a letter from the Landratsamt that says that I am no longer insured. The story started like this: I completed a car and private pension insurance with an insurance representative of ergo. After about 4 months a letter came that my previous insurance does not want to pass on the sf100. Then the representative came to my home several times unannounced and copied the invoices of my pre-insurer. The representative said from the beginning The half-yearly fee, however, was 350 euros. First the insurance man told me not to pay this amount, because it was a misunderstanding and after another 2 months I received the termination from this association. After this letter the representative called and said that I had a problem, because the vehicle was no longer insured. I threatened to go to the lawyer. Since this insurance group has already made negative headlines several times, among other things with the prostitutes for the best representatives or was suspected up and rip off the ergo in 2011. The representative said that he would clarify this with his superiors and then call me immediately. This is now 2 weeks ago and now the letter came from the Landratsamt. What would you do now?