All round bad service

I canceled my adsl line and gave the 30 days notice. Final date was on the 4th of August 2019. When checking my final statement, I am sill being charged for period after the 7th of August 2019 nevermind the poor service towards the end of my contract. I am still waiting for the accounts department to get back to me on my case logged REF *** and now am being charged for late fees because of Telkoms inability to respond. Just bad service all round from Telkom.