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Sorry i have to talk in english so i can clear things more , we bought a samsung galaxy from Gronau westfalen O2 shop and we should pay 22.50 euro pro monat and 5 euro for sim card, we had problems and mahnung first 2 months because the worker there said that there was no money in the account today i got a letter from O2 that i have to pay 385 euro because we didnt pay the last 3 Raten although there was money in the account and from my bank auszug O2 has never tried to take money from my account only the 5 euro and not the 22.50 euro, and now i have to pay 385 euro because the worker there has made a mistake with the vertrag can you please tell me how can i fix this problem , thank you so much in advance