Disgusting customer service from Samsung Promotions Department

I did a cell phone upgrade on 9th of November with MTN and I qualified to receive the ear Buds and fit watch. I received delivery of my phone on 25th November and there were no promotional items attached. I called MTN and I was told that The sales consultant failed to inform me that I would have to claim these items on the Samsung Members App. I did my claim on the 26th November and a day later I received an email that it was a duplicate claim. I was to send proof of purchase to the email address provided. I sent the necessary documents and I have been phoning and emailing Samsung, but no one answers the telephone or responds to the emails. It has become rather frustrating dealing with such pathetic service from an International Company. MTN is also at fault because as an MTN customer, why should I deal with Samsung to get my promotional items. MTN gained an upgrade and all I gained was stress that a cancer patient doesn't need. When I called MTN, I get transferred from one department to another, and no one is willing to assist. When I chatted to a Sam's agent on the Members App, he was unable to assist. From reading all the complaints about Samsung breach to honor its contract and their non-customer service, I hope that something constructive is done about this. I want my promotional items that are due to me. I think MTN and other service providers should not be passing the buck around, they should make an effort to assist their customers, after all they are nothing without us. If we all cancel our contracts, they will lose out drastically.