REFUND -Waiting for 2 months

On 24 November 2017 I contacted the DMC offices to enquire about a settlement amount for one of my accounts. The said amount was then paid via EFT. This account was usually paid via debit order. On 27 November 2017 the debit order was still deducted from my account. I called in again and explained that I had settled the account via EFT and forwarded proof of payment. In December I was advised that the refund process would take about 2 weeks to be processed. I called once again in December and was advised that the refund was processed and the query had been closed. Even went to check my bank account to see if I may not have missed it. No luck for me. I cant seem to get an answer as to when I will receive this refund. I work in the finance area too and know for a fact that it does not take 2 months to process a refund. This is just ridiculous and bad customer service . You guys are quick to call and find out when us as consumers will make payment but when it comes to service delivery you guys just dont seem to care.PLEASE ADVISE ON WHEN I WILL RECEIVE MY REFUND!!!!!. An answer would be highly appreciated