Samsung G2 Portable External Hard Drive — Delay of Service center

Address:

West Bengal

25th November 2010 I bought a Samsung G2 Portable external hard drive from Karfa Infomedia.I found sped of Harddrive was only 1mbs.
On 29th November 2020 I gave it to Samsung service center.Still now they have not replaced my hard drive.
Each time called them the told me to wait till next monday.Today I told them to back my money.They again told me to wait till next Mon day.Samsung customer care told me to contact service center when I called them.Service center says they have no stock.

Product model:MU032DC/GB
SERIAL:E[protected]
My Ph.[protected]
[protected]@gmail.com

Service centre Adddress:
18/2 Nepal Bhattacharjee Street.
Kolkata-700026
Ph.[protected],[protected]

Shop Address:
Karfa Infomedia
Ph.[protected]/[protected]