Pathetic service

Account no ********** 96878: 2 Aug 2017 - cancelled ADSL line (very very very very poor service) 2 Aug 2017 - auto response said they will respond in 21 business days. 6 Sept 17 - no response - I sent follow up email 13 Sept 17- no response - I sent another follow up email 19 Sept 17- despite cancellation, they still sent me an sms on this day to verify my details !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 26 Sept 17 - phone call from Telkom told me how sorry they are about my cancellation and told me someone will phone me to say how much I owe Telkom, taking into account when I requested the cancellation, they kept sending accounts. No phone call received. 9 Nov 17 - last account or correspondence received. During Feb or Jan - Telkom put the amount of my account on my credit record as bad debt. 7 March 2018 - sms received that Telkom handed my account over to attorneys and that I must contact them. 7 March 2018 - sent attorneys proof all my correspondence with Telkom - cancellation and thereafter. 14 March 2018 - received another sms from Telkom to verify my personal details 12 April 2018 - account received from Telkom with R0 balance. I phoned to clarify - Telkom changed my account to R0 owing to them. In actual fact I now have a credit with Telkom. MY REQUEST IS: Reverse the action from my credit record immediately and and ensure my credit rating is rectified, otherwise I will go further with this. This has affected my credit record negatively and it is all due to Telkom's ineffeciency/negligence/pathetic service. I will be ashamed if I'm in their position. This has put me in a very bad light/bad position and its due to no fault of my own.