Refund duplicated payment On the 29th Feb 2016

On the 29th February 2016 I paid a monthly instalment of R180-00 towards my Cell C top up account with Easypay at Shoprite, Soshanguve Crossing.. Simultaneously, CellC also debited my bank for R178-00 for the same account. I have only one Cell C account. On the 01st March 2016 I contacted customer service requesting a refund of the duplicated R180-00 payment. I was later given feedback that a refund will be done within two days. Till today no refund was ever deposited in my bank account.