How do I get the 50% off coupon

I was in the store and purchased 4 items. The lady in front checking out said she forgot her coupon. I ask the clerk and stressed I could only get it in a coupon circulation called save more, but I did not receive a coupon for my next visit. What circulation carries the coupon and should she have offered me a coupon after my purchase. Thanks for your return. message. Have a blessed day.

In ads or they give them to you in the store