poor service

on the 29/12/2015 i called mtn to do a sim swap.the first agent i spoke to said she couldnt assist and gave me a number that i need to call only to find the number does no exist.called them agin and the next agent also said he coulndt assist,gave me another number and offered to tranfere me to that depatment but the line just cut me off.dialled the number that he gave me and it rang unanswered for more than 5 times.i kept calling for the next 30 minutes and they just kept on giving me more numbers and kept transferring me and i still didnt get any assistance.im soo frustrated with their service,it is very poor and their agents are just not interested in assisting.half the time the network is not available for you to get hold of them..if they dont want to assist clients they just need to shut down that customer service centre because its a waste of our time calling them when 99 % of the you dont get assistance......