Fastrack — strap not getting from last 1 year

Address:

600053

Sir
I ve purchased fastrack watches at 2013.
Model no. 4052pm01.
But i am not getting the strap as spares
Reason.
The chain locating base black plastic area broken. Its second time. First time i ve got chain on first time after continuous follow up for 4months. Second time iam trying to buy chain since 2016 (1.5years over). But not got it.
Kindly help to send one chain with black base.