Given an attitude and was told to call customer care

Hello. Yesterday I went to cell c Centurion for my phone upgrade and a lady called Precious was the one who was assisting. She didn't have time to explain to me what was the problem just told me that I skipped 2 months without payment on my contract and when I asked her to check on her computer if I'm owing cell c anything she didn't want to check for because she was in a hurry to attend a friend that came in while I was still there. She rudely told me to call customer care if I wanna know what was happening with my contract. I couldn't understand why I should call customer care while I'm at the store and she has all my information infront of her but refused to assist me. She just told me that my credit score is low I should pay atleast 3 months and which I also don't understand how because my contract expires on December. She failed to explain anything to me just told me to call customer care.