Poor Service from MTN Lephalale Mall

I bought a Samsung S25 Ultra from MTN Lephalale Mall; I also bought the Samsung Galaxy Watch 7 40mm along with the phone. They didn't have the watch in store so they gave me voucher. I retrieved the watch using the voucher and it was delivered, on delivery I realised that the watch does not fit around my wrist because the straps are too short. I reported the issue to shop and I have not been getting any assistance to resolve the matter. The staff at the store make it seem as if it is my problem and that I should sort it out on my own. I am very unhappy with the service.