poor service from consultants

I am a contract holder with Cell c i had a faulty contract sim and i phoned the call centre as they explain to me its a technical problem on there side they advised me to go to one of the cellc outlets nearby ..when I got to the store in chatsworth centre there service was pathetic as I approach a consultant he wasn't willing to assist me regarding to my problem..I had to then phone cellc customer care line an then they had to sort the problem ..