Problems with insurance changes – offer != contract?

insurance before registration fooled hi, I’m still going crazy! first of all to the situation: I have now that first car that should be insured on me. I’ve been looking for a cheap insurance. by a work colleague I came across a woman who works at the German estate consultancy and advertises for achener and münchener. I was at hug coburg: 15tkm in the year, 150€ self-participation, other drivers are allowed to drive –> costs me 1577euro in the year. then I was 2 times at the wife of Wett-beratung. und die mir 1200euro im jahr ausgewählt. ich dann doppelkarte geht und ab zur Einlassungsstelle. drive now 2 weeks with the card without a fixed contract to sign. (since she was on a hot holiday and so on and so on and immediately) now she calls me and thinks her is a mistake (she thought I was older than 23, although I was with her 2 times and she asked me the first time I was born and then asked me how old I am!!! 19 !!!!! at the 2nd time she asked again for the birth date). instead of the 1200euro I should pay 2800Euro in the year (if I want to keep partkasko and more) then I turned down the shit and then she came with her super-duper offer. 4xxEuro per quarter without partkasko, without my other wishes and with only 9tkm in the year ) she meant to me now I have to stay with the insurance. I meant only neoöö, further dream…… I will not drive at first, until me n car CORRECTly insured. so, now my question, how does it look now? can I just go to another insurance and get a normal insurance or how? what? where? after all, I have my car with the double card approved by her. hope to understand. actually has something to do with cars. am just sour now! and now I want to know how it goes on. mfg