Fed up!!!!

I write this email out of desperation for some sort of result as I have been patient an understanding client. However I am now at my wits end with Cell C.in July my mother lost her phone at a supermarket and she was sent from pillar to post. Eventually she got the replacement phone and on the 14/08/2017 she called the call centre and spoke to a Margaret to cancel the insurance on the device she was told that she will serve a month’s notice and after the month they will cancel her contract which would be the 14/09/2017.On the 12th of September they debited the account for September an amount of R65.99 which was supposed to be the last debit. As per the agent that confirmed to my mother. The account was debited again on the 30/09/2017 an amount of R116.00. which was not supposed to be debited in the first place. I have attached for your perusal the bank statement. I have sent a request for a copy of the invoice (29/08/2017) for the new insurance, to date I have not received it. Cell C keeps on debiting the account and not even putting the data and free minutes. Now they have suspended her number yet they are not being owed anything she cancelled the contract and the insurance. I requested for a replacement invoice for the device on the 29/08/17 and till today I have received it.Why is it so hard to get it.it seems like it's hard for them to get anything right.MY MOTHER CANCELLED HER INSURANCE AND CONTRACT WITH CELL C!!! GET IT RIGHT. SHE DID NOT UPGRADE IT WAS A REPLACEMENT ON A LAST PHONE. This is very irritating to say the least