Order missing items- not reimbursed

I do most of my shopping online and I recently ordered some stationery from CNA's online store, which I had never used before. Several days passed and my order wasn't dispatched. I emailed the support centre, inquiring when my order would be dispatched and never received a response. A few days later an automated email was sent to me informing me that my order had been dispatched. When my package arrived, I found it was missing 2 items, and one of the items included was incorrect (not what I specified when I initially placed my order). I emailed customer services requesting that the missing items be sent to me, or, if they were unavailable, to refund me the cost of the missing items. No response. My heart sank further after reading the multitude of complaints about CNA on this website. Truly ********** service- avoid if possible.