Kolkata Air Foreign Rlo Building — Foreign parcel stuck

Address: Binoy Badal Dinesh Bag S, Lal Dighi, B.B.D. Bagh, Kolkata, West Bengal 700001

I have a foreign parcel which returned back to RLO KOLKATA on 28/06/2021
With article number: RE[protected]SE
And there's no contact number available online for RLO KOLKATA