Non-existent customer service

I bought a pair of oakley sunglasses at mat and may in mimosa mall in bloemfontein in middle august 2017. I was deciding if i should buy from sunglass hut where i normaly would purchase my sunglasses or rather try the services of mat and may as they were running a special that if you purchase a new pair of oakleys that you would also receive a limited edition oakley cap as advertised in store, i was actaully also looking to buy myself a new cap( took a picture of special ) so whilst purchasing the pair of oakleys i enquired to the lady assisting me she must just remember to give me my cap. She repledmthat she does not work here and that the lady that normally works here did not pitch for work and that she does not know where the caps are. She instructed me to leave my details in the book and the sale lady would call me back. After 3 days no reply so i called myself and was instructed that she will get the caps and let me now, after about 4 more days i was in the mall again and visited the store myself to enquire ( since then the add has been removed ) the sales lady said to me that she will take this up with head office and advise me or or that her non existing area manager or something will call me and make arrangements for the promised cap. In the meantime i have made contact with mat and may admin on facebook over the chat application again with one week intervals inbetween replies and promises. Everytime i am promised that a reprasentative from the field management team will contact me and this was first promised on 7 sept after waiting nearly two weeks. This might seem as a small issue but it was advertised instore and i made my decision to purchase from your institution based on what i saw and what was promised to me. #shouldhavegonetosunglasshut