Bad customer service in terms of payment allocations

I am extremely disappointed and frustrated with the services I've been receiving from telkom as of recently. I've been doubled billed and whenever I make my payments they still tell me that I'm in arrears when in actual fact they see my payments reflecting on their systems but still hand me over to their collectors which I don't understand. My telkom bill has been a mess for the past 2 months and whenever I call I'm not receiving the necessary answers, and I'm just sent to another person who cannot assist me. I spoke to Leila on the 6th of February and she put me on hold to a point where the call cut and I called back abd spoke to Refilwe Baloi which I had explained my situation to. She said she saw my payment reflecting on their collections system and still needed to be allocated to my account but they had already suspended my account which I don't even understand why coz my payment was reflecting. The following day my account was unblocked but I still received emails from their collectors stating that I owe an amount that I already paid and they at telkom confirmed that the amount has been received. It's frustrating to keep getting threats about my credit record when I know very wel that I've paid up to date and the issue is now no longer mine but an issue telkom needs to sort out. Please assist me some how because I am sick of constantly calling and no one resolving this problem for me.