Samsung and MTN promotion con

I pre-ordered my Samsung galaxy s22 ultra online, the phone was delivered in March of 2022. The promotion running was pre-order online and received buds and a A8 tablet. I redeemed both on the Samsung members app. I was successful with both claims received my reference numbers etc. I have received my buds but no tablet. I have phoned Samsung promotions department on numerous occasions and after waiting on hold at times for well over 30 minutes before someone answered the phone only to be told it's not their problem but lies with Mondo and MTN. I have emailed but have not received any response. I then phone Mondo many many times who keeps escalating the problem to whoever but once again get no response or help. I phone MTN who is absolutely useless and very unhelpful. Why is nobody willing to help or take responsibility for a promotion that was clearly advertised? Also why can NOBODY return a phone call when they say they will phone a person back? I received the email confirming success on the 28 March 2022 but to date I have had no joy or help from ANYONE!! Don't run promotions if you have no intention of delivering.