Apple India — Product wrongly sold

Address:

Siliguri

I had purchased an iPhone 12 64GB with adaptor and a Magsafe battery pack from imagine - Apple Premium Store Sevoke road Store on 28/04/2022, billing details of which are as follows :-

Seller Name: KBRL Retail Ventures LLP
Seller Address : Crossing of Sevoke Road & Church road, Sevoke road, Siliguri (734001), West Bengal
Customer Name: Kunal Agarwal
Bill Date : 28/04/2022
Invoice No.: (SR/22-23/10307)
Bill Value : 73, 700/-

When I was buying a new iPhone, I told the Salesman that I was currently using iPhone 12 mini and had battery issues.
Then, the Salesman of your esteemed Store sold me the Magsafe Battery Pack promising that it has 10, 000 Mah capacity and will charge my phone atleast thrice with one full charge. I had also told the Salesman that if the Product didn't work as promised, I would come back to return the Product, to which he agreed.

After a week of Purchase, I went back to your store after trying to charge my Phone twice to complain and ask for an exchange. I was given another Magsafe by your store to try. After which, I had gone outside Siliguri for a month.
I was (still am) thoroughly dissatified and shocked that the Magsafe Battery Pack was only charging my phone upto 60% . After which, when I went to the Apple Service Centre, I was told that Magsafe is just an alternate Battery and would Charge the Phone only upto 60-70% once the Magsafe Battery pack is fully charged.

Being an Apple customer for over 10 years now, I am very disappointed with the following-
1. The lack of knowledge of the Salesman,
2. Wrong tactics to sell Products, and
3. Making life further difficult of a Customer who is already in distressed.
As inspected by your Salesman on 16/06/2022, The Magsafe Battery Pack is Brand New and is of no use to me.