Stainless Steel that Rusts from SATARS CASH AND CARRY

I purchased a STAINLESS STEEL Bread bin from sattars cash and carry .2 mnths later i found rust inside the bread bin .When i went to store this morning having travelled from the South Coast i had a very NASTY experience .The gentleman that assisted me said to me he cannot do anything after he spoke to the manager I asked to speak to manager .Avery RUDE person by the name of Abdulrahman (I think) tell me theres nothing he can do and started talking me down .My ? is if you purchase a stainless steel item you dont expect it to rust .According to this manager its NORMAL to RUST and therefore he cannot exchange it or give me a refund