Telkom is *** service provider

I am writing this review with disappointment from telkom as I took a contractor with them 2023 October and 3 to 6 months everything went smooth as they were debiting from the bank but as in happens in life that we face financial challenges, one time they went to bank to do debit but due to insufficient funds into the account debit order bounce and it automatically canceled the the stop order and the following month I did a manual payment through eft which became a norm to me as I continued paying and recently just receiving sms from on of their third party telling me that the account has been handed over to them due to outstanding payment and I tried contacting telkom to tell me which month i did not pay and they can't tell me busy saying last month they tried to debit from my account but couldn't get money so its debit order bouncing amount