Refund and exchange policy

On the 12/12/2015 i went to Eastgate mall and purchased a watch to the value of R895.95, i have asked the cashier if i would have problem returning the item she advised that i shouldnt as long as its within 30 days of purchase ( not once has she mentioned that it will be in a form of a gift card and that they dnt do cash returns) i then decided that i wasnt happy with the watch so 14/12/2015 i took it to Sandton city mall to return the watch for my cash refund and they tell me their policy is not cash refunds the manager Justice told me the person who would be able to Authorise this is not in and i should come the next day i returned on the 16/12/2015 he told me its a holiday and she is still not in he and another manager Josy promised to get her to contact me 1st thing the next mornin i didnt get any call so i called her (head offfice Michelle Roux) all she can insist on is her policy is no cash returns and they wont be able to do anything about it even tho her staff Failed to give me this important infomation when i asked her i think this is unacceptable they say they have their returns policy at the cashier but it wasnt visible to me, i would like to have my money back