My phone got hacked?

Soo, I want advice from anyone to tell me if my phone got hacked or not as sometimes things suddenly disappeared like music and photos , apps stop working even tho it's not an old phone , some photos when I delete it it came again saying that error couldn't delete
It really gets on my nerves, so what do u think guys, and if it's really hacked what should I do
My phone got hacked?
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