Failure to action reasonable request

I have all my years never been treated like a ********. cell c customer service lacks empathy sympathy and ohh yes human factor. I am not a machine nor do i like robotic answers. I called cell c customer for some assistance. i have been experiencing a bit of financial difficulties and requested if i could pay my account double on the 25 may 2019.i was told it can be done and my account suspended.. Let me state this clearly i have no issue with this as i will be cancelling my contract soon.The issue comes were i have been paying my contract for the last four years via eft...and not via debit order.i gave cell a simple instructions to customer service please remove my dd details otherwise i will be charge a R88 failed debit order.the answer i got was they cant remove it and i must have a valid reason....ummmm its been four years of eft payments not valid enough to remove what nonsense is this of i cant... i am the customer and as a customer a reasonable request should be action accordingly..why is it when i speak to customer service they sound condescending.. if they dont want to be there just decide what you want in life but dont take it out on me i am sick and tired of of being treated this way... can someone with authority please assist me.. ....