Unhappy loyal customer

So last week I wrote a review about how dissapointed I am about not receiving a welcome pack with my Note 9 (MTN upgrade), I did recieve a response informing me that it was a "while stocks last" promo (MTN did not metion this,and did not inform me that they where out of stock). So too cut a long story short, I have gone to more than 10 outlets that stock Samsung accessories looking for a HDMI cable for my phone, only to be told that they only recieved stock to give away with the phone and that it can not be purchased?? Please I desperately need one, please don't you have one lying the office somewhere. I have been a loyal Samsung customer for years as I LOVE the brand. Thank you for your time. Gavin