Vivo Mobile India — Not properly charging

Address:

sreenivasanagar,anantapur,ananthapuramu dist, andhra pradesh.

My phone is vivo v15. It is not charging properly. It starts the issue in lock down period.in that time my near vivo service center is closed because of lock down.in same time my warranty was also expired. But the vivo wed sites telling if in the case the warranty will in the lock down period. It will extend to me 90 days. Now they are opened the service center. He told the phone pin was lose we want to change it. But they are telling we not able to do. Because the warranty was over.