Telkom No Service

I went to Telkom Lakeside Mall and cancelled a contract, received Case: ***2 logged for Service *** Received no feedback or cancellation confermation BUT funds of R1,736.33 was deducted for period 1 Dec to 31 Dec 2021 on Invoice A*** I need contract cancelled as app**** for 18 Nov 2021 and refund of funds for December deducted from bank account. Tel. no 081 180 phoned various time but no answer for 15 minutes.