Instruct: Classify an Amazon review as either positive or negative.
Query: POOR CUSTOMER SERVICE

THIS ITEM WAS RECEIVED TWO WEEKS LATER THAN AMAZON PROMISED. THEY SAID IT WAS IN STOCK AND WE GOT THE EXPRESS SHIPPING?? WHEN WE CALLED TO FIND OUT WHY, THEY SAID IT WAS A PROCESSING ERROR AND WE NEVER RECEIVED CREDIT!!! AMAZON DIDN'T STAND BEHIND THEIR WORD. FRUSTRATED.....AND TIME WASTED!!! BUY IT AT WALMART LIKE I WILL FROM NOW ON!