How did u find who was calling?

This person is texting my daughters phone. When we told her she had the wrong number she kept replying with abusive messages. I called her, left a polite message on her voicemail and told her to stop harassing us. She has continued to send inappropriate text messages. Her name is coming up as Arianna Offord. Her last text is a link to what I suspect is a virus link. I will report this to the police if it continues.