Has anyone had stuff go missing in Farwaniya because of the postal code?

Jordan Franklin 4 w

I do a fair bit of online shopping and have stuff shipped from overseas. A couple of my packages recently were delayed and I am wondering if it is because I might be using the wrong code. My friend said that in Farwaniya just writing the general area isn't enough and you really need the specific one for your block. I live in Block 3 and want to make sure my next order arrives. Does anyone here know the exact Farwaniya Postal Code for that block? I want to update my address details to avoid any more problems with my shipments.