HUK 24, huge stress!

Hello, I received a cover card for my car at the HUK24 in January and then also approved it. Unfortunately, I forgot to pay the amount, which was certainly not intended. Today I received a letter from the HUK24, in which I was informed that there has been no insurance cover since the end of January. I did not even get a payment reminder. You gave me the insurance, in addition I should pay 38€ fees. The registration office was also informed. Who has had similar experiences?. If I present a cover card to the registration office, the thing should be done, shouldn’t it?. I am Strocksauer about this behavior and will also terminate my wife your car and my 2motorcycles. Wish everyone a happy Easter