Please Help, Somethings Not Right
Ok so last week I was up late, I think around 2 am. My phone starts vibrating so I unlock the screen and I see someone is calling (typically you answer from the lock screen, but I have Move to Unlock installed so it might be different because of it). This is when it gets weird. Someone's name is displayed "Sophia" and she has a picture next to it, a very creepy picture (portrait photo from a computer web cam it looks like). There was no option for me to "decline" the phone call because the button was blank. I decided it would eventually stop ringing so I put my phone aside. I was wrong. The phone kept vibrating for 5 or so more minutes straight without stopping. I "resprung" (if your unfamiliar with jailbreaking, respringing is like a quick restart) my phone to get it to stop and decided to do some more investigating. First I made sure she wasn't in my contacts (she wasn't), then I checked my call history and her call wasn't there. Then I realized my phone wasn't on silent or vibrate! So at this point I was flipping out. How was her photo there? Why was my phone vibrating instead of ringing? Why couldn't I decline? etc.
The next morning (Sunday around 8) she called again. This time I could decline, but my phone still vibrated. One again she didn't show up in my call history.
After that Sunday it seemed the calls stopped, but just now (Friday, starting around 8) she called again. My phone rang this time, but with a different ringtone then the one I had set. I declined the call, checked my history and she wasn't there, again. After about a 30-60 minutes she called again and i declined.
I need your guy's advice. So many things don't make sense about this call. Is there some type of app/software to do what she is doing? Should I answer the call? I don't know what number she is using so I can't block it and I have absolutely no clue who she is.
I have also included a screenshot I took, just in case you wanted to see what I am talking about. Thank you for any advice!