Failure to refund for cancelled service

I terminated my ADT contract in November 2014, with a one month notice period. In January I was debited again with R700 (an amount exceeding my normal subscription). On 19 Jan 2015, Nandipa at ADT forwarded my request for a refund to the billing department. On 28 Jan, Nokutula escalated my request and said the refund would take 10-14 working days. On 13 Feb, Darren sent another request to the credit controller Swanie. On 19 Feb, an amount of R247 was refunded. And my request has been escalated yet again. <br> It is impossible to get a human being to call me back, never mind give me a refund. Thieving *******s!