Realtor misses termination, senior verse rights, who is liable?

1. My (registered) car should be insured with another insurance company, and for this purpose I applied to a Ves Mkler and concluded a formal brokerage contract so that the broker could take the necessary steps. To re-register the vehicle I also received the necessary documents and the insurance certificate from the new insurance company (B) and the Fz was registered without any problems. After about 2 months came from the previous insurance uncertainty. g (A) a letter, in which it was informed in spirit that the old contract was still in existence, and the old insurance company holds the “older rights”. It turns out that the broker did not terminate the old contract, and I received the notice from the broker that “there would be no problem” if the Fz were to be cancelled later this year. Otherwise, I will be asked for notification.” Another 2 weeks later I received a letter from the responsible LRA, according to which the Fz forcibly closed the contract. However, it remains the question who should now bear the costs for the procedure. After all, the broker failed to terminate the old contract. However, the latter claims that the mistake lies with insurance B, which did not handle the return transfer correctly. Curiously, another 2 Where later from insurance A came a new contract application, although before It was claimed that the old contract was valid.