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Hi @Mkswamy,
Welcome to the community.
How long is it taking to charge your phone on the quick charger at the moment?
When you say it's not working, does it not charge at all or is it charging slowly?
Just to add to what @uliwooly said... Over time you will accumulate apps, some of which may be running in the background of your phone. Each app running in the background is going to cause some drain on your device, which in turn will take longer to charge.
You can test if this is the case by putting your phone into safe mode, then charging it.
It might also be worth testing how long it takes to charge while your phone is turned off.