How do you respond to someone who left your message on read and didn't answer the question? What's a polite way to ask her to stop a silent treatment?

What do you do when someone you are friends with doesn't respond to your text and leaves you on read? Do you mention it and call them out or stop texting them? What if it's happened multiple times before?
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She just got busy all. Chill.
How do you respond to someone who left your message on read and didn't answer the question? What's a polite way to ask her to stop a silent treatment?
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