Last February, Vodafone launched teaches SMS, a service that allows you to convert voicemail messages in SMS messages that we receive once again to connect the phone.
The thing already not started very well, because Vodafone announced it activate it for all its customers, prompting a penalty after the complaint by FACUA. Subsequent problems caused that the service was invoiced to customers that had not used it.
When a customer of Vodafone flame to another is offered the possibility to leave this message, but if rejects it the call does not have any costs. But the billing problems that you will be charged this service, forcing Vodafone to return those charges affected customers.
So the best is to take a look at our Bill to check if we have had any of these improper charges and, for if so, make sure that the amount is returned.