Abbott — Submit dispute ensure pack

Address: 101/2 italgacha road kolkata 700028

Respected sir madam,
I purchased a chocolate flavour ensure pack of 400g on 10th March 2021 from Frank rose pharmacy ( 1/4 ok Guha rd kolkata airport 700028).
I have purchased this ensure pack for my parents however, when they drank they found a strange smell like a damage food. So they can't use it anymore.
I told Frank rose pharmacy staff about this product which my parents can't eat due to strange smell.

Then after Frank rose pharmacy staff told me to submit the ensure pack with Bill and letter and also they told me we will submit your ensure pack to ensure company and they will provide you a new fresh pack within a week.
However, I submitted a full pack of ensure along with Bill and letter on 14th March 2021 but till now I haven't received any ensure pack.
Whenever I go to Frank rose pharmacy to ask my ensure pack details they always told me we can't do anything on this matter because ensure company is not ours and treat me like a bad manners.
I visit to Frank rose pharmacy more than 3 4 time to ask my ensur pack details but they didn't listen my words any more and treat me with rude behaviour.
I lost my full money so please refund my fresh ensure pack as soon as possible.
I shall be very appreciated.