Home Depot review: rude customer service

I have been going to this location since I purchased my home in 2011. Today 10/18/19 I went in to return some tile because my project was completed today and I had 7 unopened boxes of tile. The lady (with the thick glasses) was very rude. She told me I might not be able to return the tile and their system would flag my drivers license and I wouldn't be able to return goods to any store. I asked her since when a paying customer can't return goods they purchased if those goods don't work out. I told her I paid for the merchandise with my debit card and am not even asking for a refund but am asking for a store credit because I am a homeowner and always need stuff.

This lady act like I committed a crime by returning tile that wasn't used. As I told her, sounds like it's okay for me to spend thousands of dollars at Home Depot but not okay for me to return products that aren't needed.. I am highly offended and consider Home Depot to be on my boycott list.