Hello I am French, so sorry for my English.
Here is my problem:
I installed Avast mobile application and geo-SIM. Whenever I turned off my phone and turned on, I received premium sms telling me the SIM card with gps coordinates. I did not know that these sms was paying! On the invoice I have a surcharge of 60€, is that it is possible to refund me please?
Thank you for your response. 
have you checked FAQ section ? https://www.avast.com/en-us/faq.php?q=android
No, I will go watch it. Thanks !