Rude iStore Retailers

I received an SMS informing that I can come collect my phone I had asked them to order for me. Upon my arrival, I great this man, who I pleasantly ask if he is available, he answers and says what's up, with an attitude,I then tell him I got an SMS and here to collect the phone, he answers me and tells me it's too late to assist me at that time they close at 19h00. I was there at 18h00. Then he said he will call the manager, whom never came so we were left unattended, and proceeded to help another customer. I am very disappointed on the service I got and being looked down. All of those workers need to be taught customer service!