Walmart Main Store - Grocery

I was at your Walmart Miramichi N.B. this morning and bought to picture frames and the tag said $5.00 and when I got to cash in they rang up 12.00. asked for assistance and I think it was a supervisor said she have to check. Waited Waited for her to come back and say There 12.00 some one put them in wrong place. It's someone job to look after that department so your not ripping off customers. The picture were in 5. In front of the 5. Tag. Very disappointed in the way it was handled.Joan Harper