my friend has a stalker help

so this has been going on for MONTHS.
at first it started with this freaky file being downloaded onto her phone(which she couldn't delete) and then they kept sending her more and more stuff.
She has about 48 files now.
Theyve also sent her pictures through files. NOT ANYTHING TOO BAd. Just a picture of a note and... his... abs...
AND we know for sure that its too people behind this:
the first one is the dude who started this shit
and the second is a girl(?) who's apparently trying to keep the freak contained.

ANNNNDDD. They can see through the camera and can hear shit through the phone.
Shes tried EVERYTHING to get rid of this guy and nothings worked.

PLEASE HELP