Commitments not met & no effort to remediate

I app**** for a new contract on 13-06 at Vodashop Trade Route Mall. The device I wanted was out of stock & I was told by Shuaib that he'd order one and I could collect this Saturday, 20-06. I went to the store this afternoon and stood waiting to be served for almost 10 minutes, while 3 consultants were free but too busy chatting with each other to see there was a customer waiting. When I ask Shuaib for my device, I was told that it was taken by another sales consultant earlier in the week. I asked Shaahid Valley if he could get another device from the other store in the mall but was told they couldn't help me but seemed very nonchalant at the fact that I was quite disgruntled by this point in time. Neither him nor Shuaib made any effort to calm the situation and were also very nonchalant at the fact that I was going to submitting a complaint. Clearly, Vodacom does nothing about bad service in their stores if they were so comfortable with me laying a complaint. I would like to cancel my new contract with Vodacom as I'll happily take it elsewhere where my business is more welcome.