Disappointment with Customer Service at Cape Gate Branch and False misleading promotional signage

I went to the store intending to purchase a watch for my wife and noticed a "Buy 1, Get 1 Free" sign on the Tempo watches display. Based on this signage, I selected a watch, only to be informed at the till that this specific watch was not included in the promotion. My question is, why would such signage be placed directly in front of watches that are not part of the sale? This experience left me feeling misled, as it appears to be false advertising.

The lady that assisted me was clearly a trainee and needed assistance and guidance but was left to assist me on her own. When the manager finally arrived, she was so rude, unfriendly and arrogant, did not acknowledge or greet me and then blatantly ignored me when I informed her I was in a smash and grab and needed a new card. instead of assisting me, she left the store and I was left with a trainee who was overwhelmed, and tried her best to assist me, When the manager arrived approximately 30 minutes later, she proceeded to assist other clients and did not even check on me.

I expected better service from your brand and want to know why you are misleading clients with your promotional signage.