Samsung Galaxy S21 Ultra Promotion is a **** to lure customers

I submitted my claim for the Samsung Galaxy S21 Ultra promo together with the tax invoice from Vodacom reflecting my IMEI number on it but I keep getting a response from Samsung to say my claim is rejected as the person verifying my claim cannot read the IMEI number on the invoice. I resent the invoice highlighting the number on the invoice together with a screenshot of the device information but I haven't received any confirmation thereof. It's been a back n forth issue & I am seriously starting to regret getting the device if this is the way my claim I am due to receive is being handled. Instead of feeling happy for my new device and getting excited for the promo items that is meant to come my way, I just feel unhappy like this was a mistake. Can someone please assist me?