S9 additions not received

I purchased a Samsung S9 online and on contract. I received the phone with no voucher, as a result i am unable to claim my R500 Samsung accessory deal as advertised as well as Samsung rewards does not work with MTN so i cant receive my Fit pro 2 as advertised. The MTN store sends me to Samsung in order to sort this out and Samsung sends me to MTN. Please could we get this sorted, it has been shocking service. I have the invoice and want to receive my R500 voucher and the Fit pro 2 as this was promised when i place the order and upgraded. This is not the service we should be receiving from these 2 brands!!