My phone cant be charged.without charging how can i use phone

Not charging

Take look at the article below with some troubleshooting steps to help with what you've been experiencing.

If your iPhone or iPod touch won't charge

See also About recalibration of battery health reporting in iOS 14.5

Same answer as above.

You have to resolve it not the users on this forum.

or contact Apple Support directly. Depending on your region, you may be able to reach them here: Get Support