Makro took my sons Christmas present and don't care.

My son wrote to Christmas father that he would like a drone that can record image. I 1st phoned makro to ask them about the drone, and between 2 different makro's i received different price on the same product. I went to makro woodmead from a meeting, and purchased my sons Christmas present well in advance. on Christmas day, we open our presents, and the smile on everybody face to received their presents is just price less. 1st thing a dad must do is to assemble the drone, because we are going to fly. well, we were going to try. Yes, parts missing. I went to makro Silverlakes 27 december, and they gave me a battery from a other drone. Back home, and we charge the battery. After the charge, we want to put it in to fly the drone. The battery don't fit. Next morning, back again at makro silverlake. I asked them to rather give me a new drone, for the red lights is starting to shine that this product is a demo model sold to me as a new one, or it's just a bad production product. They agreed to exchange, and gave me a voucher to get a new one. Back in the shop, and Yes, they don't have stock. I went back, and they said that no makro have stock, and i might wait a week or so to receive a new one. The drone sold for R999, and i paid with my card, and a voucher i received from makro for my birthday. They only gave me back R899 voucher, and it was only valid to use in their store within 6 months,. The R100 birthday voucher was a privilege as per makro agent, and i will not get that back. Even if i buy something else at makro. Please note, the voucher does not say that its a privilege. My son was with me in the store, and i decided to replace the Drone with a more expensive drone that have the same function as the one i bought my son. And again, they do not have stock. My son is getting irritated, and just want to go home, and Makro have the attitude of take it or leave it. I asked them about my rights as a consumer, and they will just keep quite and have the far away look. My son then took a play station game, and we went home. He is grate full, but his Christmas present is not what he wanted. Thanks makro for taking my sons Christmas present, and force him to take something he did not want. I have rights, and feel that my consumer right is been valuated, and makro did not put me in the same position or better with the purses of my sons Christmas give.