Telkom...No help with the COVID19 Cancellation

I am an unfortunate victim of COVID19 and lost my income. I tried to call Telkom customer service, but never got through. I went to the store in Alberton City, Germiston, to cancel my account so that i dont get billed at the end of the month. i explained the situation and told them that i don't have an income, i was informed of the 1 month cancellation, i sad you guys were not open, and i could not hold on the line too long for customer service, i did not have enough airtime. i was told that even if i canceled today with immediate effect and don't use any of their services i still have to pay in full at the end of this month. i said i wont have any income to pay, a lady by the name of Raewinsley Moosa, help me cancel the account with immediate effect and her response was oh, you will be black listed if i dont pay. I have been a loyal customer and is in an unfortunate situation...Come on TELKOM...surely you can understand, rather than threatening clients to blacklist them.