Second hand iPhone 7 activation lock?

So I bought a secondhand iPhone 7 and when I tried activating it, it had an activation lock. I contacted the previous owner and she had no idea what her stuff was. Anyway I can possibly connect it to iTunes and possibly solve the problem there? I need help!

Looking for a certain type of iPhone headphone dongle?

So a quick search on amazon only shows a dongle which you can use to connect 'normal' headphones to the new iphones with a lightning connector.

I'm looking for a dongle that does the opposite i.e. I want to use the earphones that came with my iphone 7 with my laptop (laptop just has the normal hole not a lighting connector). Hope this makes sense! I'm not sure what the proper terminology is. If someone could tell what such a dongle is called so I can search for it on amazon or better yet link me directly to such a dongle.

My phone has gone purple?

I've had my iPhone 5s brand new for a few years ( dropped it very few times) i woke up this morning and went on my phone and it was fine but I've just gone on it now and it has purple lines down the screen and i can't see anything is it broken? I've just turned it completely off and I turned it back on but nothings happening. Thanks for any helpful answers

Added (1). yes i have multiple times