Hi @Adriana26, sorry to hear about this. 
Your question has been translated to English as this is an International forum, please post any replies in English and it will be easier for me and other users to assist you.
Do I understand correctly that you have very recently been able to use the Google Play store in your device, but now it's not available at all, or is the icon available but when you click it, it says it's not supported?
If that is the case, try performing a software repair using Xperia Companion, but remember to backup your data as the reset will delete all data stored on the internal storage.
Let me know if that helps!
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