Frustrated with Capitec

I went to the branch to close my credit card in last month. They told me I wouldn't be able to use the card and was fine with that. This morning I see that charges were taken whereas this credit card should no longer be active. I called your customer service and they don't know what is going on. Those charges must be reversed and the credit card closed. I cannot be held liable for costs for a card I am not using and do not want. This is frustrating having to deal with a financial institution who have staff who don't know what they're doing.