Delayed replacement of Fitbit Versa

I took my Fitbit Versa watch to TotalSport Mall of Africa as it had problems on 30 July 2019 and Zinhle assisted me. She said I would receive an update from her after a week, a week went by and I didn't hear anything and each time I would call her, I would either be told she is on lunch she will call me back or she is on leave, I should expect a call from her after a day or two. Still no update from Zinhle. Mid-August I called the store again and I managed to get assistance from a gentleman called Lebohang. He told me Fitbit sent an email to ZInhle on 5 August saying the watch could not be repaired and they gave me a store credit, I should go to the store to collect a new watch. When I got to the store on 21 August, Zihle told me I need to top up the difference if I want a Fitbit Versa because the price has gone up or I can take the Fitbit lite. I explained I shouldn't be expected to downgrade my watch because prices have gone, she eventually agreed to give me the same watch and said they didn't have it in-store, she is will order it from Sandton. She confirmed to me that the watch would be delivered on 23 August. Again I didn't get a call from her and I went to the store on 25 August to enquire about the watch and she then told she had to order it from Durban and she does not know when it will be delivered. I asked why can't I get the same watch in a different colour and the response I got was I need to pay an extra 1000 if I wanted a different colour. I have been waiting for my replacement watch since 30 July 2019 and Totalsport Mall of Africa has given me the worst service