Mumbai Foreign Post Office — parcel stuck at mumbai foreign post office

I have ordered a product from aliexpress and now it is in my state but it is held in mumbai foreign post office for no reason and after tracking the package this message "retained by border agency/secu | retention reason : retained by customs for unspecified reason" is showing on india post website.

Please help me with this regard asap. I'm waiting for the parcel to released soon.

Thank you.