Big C Mobiles — Billed power bank but we didn't received

Address:

2nd floor ,reddy buildings, esi road opp bsnl office, Vijaywada

We have taken vivo v15 pro mobile in ur big c at Bandar road Vijaywada.. Last year in that billing there have billed for powerbank also on that time in a hurry we didn't seen the invoice copy and we have a family function Nxt day so i have lost my invoice recently i my phone was broken so for invoice purpose i approached big c store and i have received the invoice copy today i noticed that there is power bank in that invoice copy so when i ask the store person he said to complain on complaints desk. I had charged amount of 1300rs. I need back my amount or my power bank u can check the CCTV footage but i didn't taken that... I need the rectification immediately other wise i need to take action on ur company...
Waiting for ur response