Hello ​@DariaDr, welcome to our Community! Not so nice that you lost your SIM card, very understandable that you want a new one as soon as possible. I have immediately blocked the current SIM card for you, so nothing crazy can happen to it when someone founds it.  Is it possible for you to visit one of our stores? There, my colleagues can immediately help you pair and activate a new SIM card! 

Let me know if it is possible or when you have any other questions - I'm happy to help!