Poor service and unable to solve problems

I was debited on the wrong date even though i gave them my bank statement along with my payslip that showed the date i received my salary on until to this day i was never refunded the money they overcharged me but according to them the ticked was closed and solved. Now with ny second contract i insured my phone with their outsourced company i was involved in an attempted hijacking they took our phone i struggled for the whole month before they could replace my phone, tgen in august 23 i cancelled my insurance with them, they told me that they will debit for the month of August as i need a 31 days period for cancelling the policy month end of September they deducted again and told me that is correct, how is that correct when a full 31 days was on the 23 of September y did they debited for September i am very unhappy with telkom and their outsourced company and their service is very poor they always fail to help their customers.