IBR CASHBUILD IDUTYWA

I bought Ibr zincc2017 June x 40 n i spent 13thou at Cashbuild I dutywa they promised they won't became rusty but end last yr they started became brownish n March this yr they get worse I called the manager n he requested photos to show the supplier then the supplier told me different story that still hurting me deep from my heart after I worked hard for this money told me that it was my fault I was no supposed to keep them for24 hrs after buying them coz they can be damaged if the weather is bad n moisture can damage them, they said they won't do anything