Why samsung rewards? Is a combo deal I should get it as a combo at the same time!

I upgraded my contract with mtn and got my self the current special with the samsung galaxy s9 or s9+ and a gear fit 2 pro, for free it is mtn's advertising but they don't stock the gear fit 2 pro no no no, you claim it with samsung rewards! And samsung rewards tell you that it will take up to 4 weeks before you get the promotional item, so who is responsible for this ****y service? Samsung or mtn, samsung making deals with mtn and forcing them to let the consumers use this samsung rewards app to get what is coming to me or is it a way to make you decide that it's not worth all this to get the gear fit 2 pro from them? Or is it MTN that opts for this to save money buy frustrating customers to the point where they just let it go and forget about it? I will not forget and I will get what was promised to me. Love my samsung devices but the s9 will be my last if this continues.