Dear @daparthi_yamini
Regarding your iPhone 13 issue after the Gachibowli service center’s battery replacement, you should escalate this immediately to Apple’s higher-level support via 0008001009009 (for more info, visit Apple contact page), referencing Case ID 102665235959, and demand a repair without extra charges since the fault arose post-service. Share Apple Care’s diagnosis confirming hardware failure and the store’s non-disclosure of the existing job sheet. If unresolved, file a complaint at the National Consumer Helpline (NCH) citing negligence and loss of service trust.
If still need help, reply to us.