Black Friday useless upgrade

Good day. I went to upgrade my cell phone on the Black Friday deal to a Samsung S8. Where by I could get a medium package as well as 14G free entertainment for 12months. However they were off line but I was informed that the deal would be captured as soon as they were online and my phone and tablet would be delivered to my house. After waiting a few days I phoned to find out how far my upgrade was only to be told the lady working with the update was day off. I then proceeded to email her still no reply. A week later I received a text requesting fica documents( why this was not requested on the day I app**** for the phone I have no idea). I took the documents in to the springs mall store. I once again asked how far the upgrade was and was told they were waiting for these documents. 3 days later I phoned again only to be told the lady working with my upgrade was not in however she would phone me the next day which she did. Only to tell me that MTN warehouse did not have anymore Samsung S8 or S8+ however I could take the another phone. I would however lose my black Friday special. I then proceeded to phone other stores. The first store I phoned in Boksburg told me there was no problem and that they could get me a Samsung S8 or S8+. I proceeded to do the upgrade at the Boksburg store. However due to the *********** lady at the Springs Mall store I have lost my Black Friday special. I feel that it is unacceptable that I a pensioner should have to forfeit the special. I have contacted MTN complaints line and have had no rep**** at all. Regards Florence Delport