Bad service

On the 23rd of July my phone was ****** , when i got home i called Telkom and advised that my phone was ****** . I requested that they block my phone and the lost number . when I received my bill for July i find that there has been an additional charge of R500 on my account. I logged queries and called Telkom with no luck. so I went to the branch at mall of Africa on Friday they advised that they can not help me with a billing query but they have referred my query to the billing department. I still have not received a call. so I call the billing department because I need to get my sim swap and I am unable to get a sim swap until the query has been resolved. Someone finally answers the phone from the billing department and investigates then she tells me she is sorry but they blocked the device but did not block the number so I have to pay for the utilization that happen when my phone was ******. I told her unfortunately that will not work for me can she request for the recording of when I called in to request that they block my phone then she said that it is above her pay grade she does not have access to do that then I asked if she can escalate it to someone who can help me then she dropped the call on me

this is really bad service nd you can not expect me to pay for something I did not use . I have had my contract for month and made sure that my spend limit was capped it does not make sense to me that there are charges going on through my account because Telkom did not do their jobs ins ensuring that mu number is blocked.