Extremely bad customer services with lies

I bought cellphone (Honor 600) from MTN in Newcastle Amajuba Mall. That cellphone was on promotion with free watch. I was advised that the watch will be delivered at my home address until now I have not received the watch. Every time I go there, I'm getting empty promises that the watch will be delivered to me. I was ********** my money as I would have not bought that cellphone if I was not promised that it was on promotion. I will never encourage my family and friends to take any contract with MTN. I will take a legal route to teach them a lesson. I know my customer rights