Vodacom accident damage being charged

My account has been in arrears. All I need to do is settle the account. My contract has expired with them. I was not charged for accidental damage insurance. Since the beginning of the year 2021 I have been charge for this. I have contacted Vodacom and was told that I needed to contact a certain department and they would reimburse me. I have contacted them and the agent put me on hold for a long time. The call ended and assumed that the issue was resolved. I got my statement the other day and I am still being charged for it. Its unbelievable how fast the are able to contact you to collect money but cannot assist you with something so small. I will never ever take a contract out with them. Stay away