Please note that all purchases in Farming Fever are made exclusively through Google.
If you have received a suspicious receipt from Google Play, we recommend that you contact Google support immediately. Do not give anyone your account details or password.

Our game developers can't see your payment information or make purchases on your behalf. Account owners are fully responsible for the security of their personal information, including payment information. Google helps keep your account data secure, so we recommend that you contact them directly if someone else makes a purchase on your behalf.
Learn more on the Google store page:
Google Play