Billing Error

Please can a Manager from Vodacom contact me urgently. I have had Vodacom Home Fibre via VumaReach. The internet was not working for two months. The Account was timeously cancelled, However, two debits of R409 each went off my bank account. I was promised by Vodacom Fibre that a refund would be done into my bank account weeks ago. However, no refund was received as yet. Please can you assist and effect the promised refund via Vodacom Fibre be effected urgently.