Home Depot - Purchase BBQ and get BBQ cover for free Question

Hi All,

I came across at home depot:
BBQ available at Location A, the free BBQ cover is out of stock
BBQ cover is available at Location B, but the BBQ is out of stock

Does anyone know if i can take the receipt of the purchased BBQ to get the free BBQ cover at another location?
What are my options?
I haven't made the purchase yet (want to confirm before i buy). I tried calling the store but either no one answers or I get disconnected before I can reach someone.

Thanks in advance!!