My iPhone 5s Won't charge anymore?

So, I got a new charger from an iPhone repair store about 4 days ago. It was $20.00. It worked just fine until today. It says "This cable or accessory is not certified and may not work reliably with this iPhone." It's branded by apple. It should work. I've restarted my phone. Tried plugging it in a different way, as well.

Your iphone charging jack is damaged

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