Hi, because this is ‘outstanding’ and unresolved, so praying on your mind, I would try to settle it. Online communication would be better but if that isn’t your thing, I’d write again....maybe a little note card or something...saying you hope she is ok and as she wasn’t able to let you know, you’re about to find another home for the art equipment. If you don’t hear from her in the next week or so, you’ll assume she doesn’t want it...and you understand...Some might say this is too much when she’s behaved the way she has but you don’t know what’s going through her mind, or how life is for her personally....on top of which young people can be difficult without realising it...and I’m sure you love her whatever. I would reach out again and as hurtful as it is, not expect a reply.