Terrible service

I have by far received the worst service from a consultant at the Eastgate cell C store . I had come in to purchase a home connecter Sim and the gentleman assisting me (Allen Satombo) was not very friendly. I didn't have much knowledge of the Sim card and what it entails and he somehow assumed that I was clear on everything. He did not check coverage he just told me it's R199 for 50GB, I advised him I had seen something written 80GB thinking that the data is allocated as whole and not divided on a half basis between day and night which would mean the 50GB that he has offered be less and with attitude he said that the 80GB would be less. The tone he used and Manner of approach made me feel dumb. He did not even explain why it would be less, I had to ask him how so. Surely as a consultant / sales person you can tell when someone isn't clear on the product and obviously proceed to explain in detail without having to make the customer feel dumb. This is the cell c product and it's the duty of their representative to dicuss the specifications with the client without assuming that the client already knows the product. It doesn't just end there, he concluded the sale in a rush then gave me the Sim and receipt. He didn't even say thank you instead he engaged in a casual conversation with a colleague whilst I was still seated by his desk. Is it not coutersy to say thank you to the customer when you have concluded a sale? As I was getting up from the chair to leave I said these words in zulu " Lay'khaya akubongwa mawuthengile" which simply means in this store you don't thank a customer for their purchase. In my experience of customer service is that you treat every customer with respect regardless of whether they are purchasing a high or low cost item. Clearly my purchase was too low for Allen that he had to rush through and he couldn't even say thank you.