Hello korayjrdev,
It sounds like there may be a couple of things going on.
You mention that you received a replacement AirPods. Be sure that these steps from Set up your replacement AirPods or charging case - Apple Support
When you get your replacement, follow these steps to use your AirPods again.
Set up your AirPods or charging case
1. On your iPhone, iPad, or iPod touch, go to Settings > Bluetooth and tap the Information button 
next to your AirPods.
2. Tap Forget This Device.
3. Tap Forget Device, and tap again to confirm.
4. Put both AirPods in your charging case.
5. Open the lid and check the status light. It should flash amber.
6. Press and hold the setup button on the back of the case for a few seconds. The status light should flash white.*
7. Go to the Home Screen on your iPhone, iPad, or iPod touch.
8. Open the case—with your AirPods inside—and hold it next to your iPhone, iPad, or iPod touch. A setup animation appears on your screen.
9. Tap Connect, then tap Done.
* If the status light still flashes amber, connect the case to power, close the lid, and wait 20 minutes. Then open the lid and press and hold the setup button again for a few seconds until the status light flashes white.
These steps will make sure the new AirPods is connect to the case and other AirPods correctly.
Once that is complete, you will want to reset the AirPods following the steps found here: How to reset your AirPods and AirPods Pro - Apple Support
You can then pair the AIrPods to a device and they should work as expected.
Have a good day.
