Never thought i will get BAD Service from Samsung the No1 leading Product and Supplier

I must say that i'm a samsung fan like your products but what empty promises that you guys are delivering. We (my wife and myself) got the S9 on contract from MTN in Alberton just last week. we received a voucher with the phones but when we went to Samsung Alberton City Mall we were informed that the PROMOTION EXPIRED on the 9th of April 2018 but it is still advertised on DSTV the R 500.00 Voucher with the phone S9. ***? the voucher say that the promo is expiring on the 31 May 2018? what the **** who is lying now? your sales advisor in the mall or the voucher? Now that is just the one part of the disappointment, i went to MTN then i was told that the VOUCHER IS NO MORE R 500.00 but R 375 or something like that now the DSTV is giving false information or is it false advertising from Samsung to MTN to DSTV what the **** is happening with service delivery in South Africa. Never did i think that i will get this from Samsung, I also thought of Samsung the No1 leading brand and supplier woooow what a bad experience. This voucher must be used with in 7 days from date of purchase come on the expiring date is 31st May i can use it when i'm pleased to do so and no where on the advert is it mentioned so. now the other bad news is that the accessories that you can get is the same that is in your S9 Box ***. Charger, Phone cover etc that i already received why will i take the same things come on. I will always think of you highly and will not loose trust in you but do better promotion please and let your sales reaps explain to all networks and DSTV, retail outlets etc how your promo is working, because it will point back to Samsung. Oh ja please also tell your reps to answer their phones when they get calls from their customers, as we tried to make contact with one of them from MTN. My wife and myself decided not to use your voucher keep it, we love the phones by the way.