Speaks for itself really. She has not requested any sex services but this pop up request for £40 is coming up on her screen and blocking all access to her pc for 10 mins at a time. She called the company and they kept saying that she had requested the services and she owed them £40 and the pop up wouldn't go until she paid them.
Obviously she hasn't ordered any such services and it sounds like extortion to me but how does she get rid of it?