Clarification of guarantee

I bought a markhams store branded watch on the 26th of July 2017 it was sealed and new at markhams mall of Africa, to my amu*****t the watch kept losing time and I had to manually put it back on time, it went on for days and finally I realised that i needed to take it back to the store for an exchange of the same item since it looks nice.I stay in Tembisa and work 8h00 to 18h00 during the week and I could not get time to go back to the store on the early days of my problem but I managed to be free on the 26th of September 2017(this watch is 2 months old today)so I went to the store to relate my concern, however the floor manager on duty by the name Bongani told me that they do could not assist with an exchange of the watch since there is no guarantee on the item....being furious at what I was told I then decided to leave the watch at the store so that they can give it to charity or keep for themselves since it did not meet the intended use it was initially bought for. With that kind of experience l would like to raise my dearest concern as a loyal TFG customer that the value of the watch was not my main problem , my real issue is how do you train your staff to assist your clients best when selling your goods so that we may know that accessories such as watches from your company are not reliable and are of inferior quality. I have been spending my money at TFG for years and this has been my worst experience ever.

Regards Judas Unhappy customer ( ********** 408)