Unhappy customer

Hi kindly assist me I am so disappointed to find that I am not the only person having a problem with the samsung z flip R3000 voucher after purchasing the phone, I bought mine at Watercrest mall at Telkom shop (Hillcrest durban) on the 7th of January, my sales lady was Nqobile,she registered it before giving it to me and there after was ask me to register it again and so I did yet I still received no response from samsung, I registered it again on the 10th 3days after Nqobile did because there was no response, after few days I was told that Imei number is not clear, I need to resend it so I emailed it to them again, I even went to the store Nqobile did again after that they sent me an acknowledgement saying they received my request they promised to communicate within 5 working days, up to date I am still waiting for their response, than I decided to call the number that appears below their logo, they said that I didn't give the right feedback, and told me the promotion was now over. Kindly tell me isn't that a breech of contract? My name is Makhosi Hlatshwayo I will really appreciate your help in this matter. I don't believe that maybe that was their strategy to lure customers. I used think highly of samsung but I guess they failed me, I am beginning not like this device at all, I'd really appreciate it if this were handled ...