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I lost my phone with credit card

I lost my mobile phone(iphone 6S+ Black) which there are my credit card in the case of the phone in the train in August 3th, 2017. At AM 08:55-08:57 I ride a train at the station 'Herbolzheim' and arrived at the station Ringsheim at AM 08:58-09:00. What can I do?