Tim customer service – writes the reader – wrote to him that "everything worked according to the expected mechanics and with the right tariffs as the printout shows charges for data traffic in the absence of active offers. Therefore, it is not possible to proceed with the refund for reasons not attributable to the operating system, not having an active promo it is natural that this generates tariffs based on consumption. In these cases it is advisable to deactivate the data connection, 4G or activate the data traffic block".
It is possible that the data connection was activated unintentionally. It happens when the icon is present in the notification panel. We can activate it with the face while talking or when the cell phone is in the pocket with the screen on.
The advice – if we really don't want to have an offer with a minimum of data traffic – is to remove the data connection icon from the quick notification panel; to be clear, what appears if we swipe our finger from top to bottom on our mobile phone.