Incorrect information provided costing me money

I sent a request to cancel my service on the 24 November 2022. On the 07 December 2022 I called the call centre to confirm when my service will be cancelled and when i must make my last payment. I spoke to Mphulela Buthelezi who advised that my last payment must be in December 2022 and my service will be cancelled on the 31 January 2023. On the 01 January 2023 my service was cancelled and I already made payment for the month. I spoke to Thando Mbanta on the the 02 January 2023 who advised a refund was logged and it would be processed when the account team do refunds on Thursday 05 January 2023. I've been following up the whole day via whatsapp and calls and now i'm being told my refund will only happen within 72 business hours. This is totally unacceptable and pathetic that I must now pay for incorrect info being provided to me. Now i'm paying for data since the 1 Jan 2023 due to this mishap.