If any specific operation is not working, then please to follow reset Process and need to check if single/double/triple tap efficiently

RESET the device

1-Make sure your earbuds are fully charged.
2-On your paired devices, delete/remove Noise Air Buds Mini 2 from the list of paired devices in the Bluetooth menu.
3- Open the charging case.
4- Keep the earbuds inside.
5- Long press the one key Reset button on the case for 6 seconds till the White LED blinks 5 times.
6- repeat the pairing process. 

If none of the operation is not working, then please raise an online complaint on complaint portal