shocking service and no refund

i order my fibre line with cell c and paid R1259 in advance on the 29/08/2018. on the 18 December nothing happened with my fibre installation yet after a lot of people already got connected in my area. cell c let me know that there is no fibre available as per vumatel. i contacted vumtel myself and they assured me the fibre is live and they can install at any time. i cancelled my fibre with cell c and requested a refund. i send through bank statements to show the money that was deducted of my account and was assured by cell c that i will be refunded the same day 20 december. it is ow the 8 january and my money is still not paid back to me