MTN acts like ****

I done upgrade before it’s due cause the consultant explained that I will only pay for old contract till it’s due then pay new contract after 1st one expires. Only monthend when I go to pay the bill was double n asked the consultant helping why she then revise the amount. A week after got message that have outstanding amount. Called the customer care the lady was so not helpful n kept saying I must pay. Monday my lines were suspended I then call again the guy explain then I made arrangement to pay on the 25th he said arrangements are only made on week days which agree to do payment on 27th. Line was activated the following day lines suspended done the calling game everyday only Saturday(today) was told that the arrangements were done that I will pay next day that I called which not sure why. Now been on line holding for more than 30 minutes to open a ticket. The consultant said his checking something not sure it’s strategy to be impatient n drop the phone or what