Waiting 6+ months for a credit!

We went to our holiday place in Durban in July, turned on our decoder on the 6th July 2015, called to turn it off in the 12th July 2015 and was told their system is under construction and will be back up on Friday the 17th July 2015. I phoned on the 17th and explained my call, I was told that my decoder was disconnected from the 13th July 2015 and I will only pay for the 7 days from the 6th to the 12th July 2015. On 1 August 2015 a debit order went off my account for 3 subscriptions, I phoned customer care to query this, was told that my decoder was not switched off and was charged for July and August, but they would correct this and my account will be credited with 1 month and 18 days subscription. Since then I phone them every month to enquire about the credit and am told that they have \escalated"the query to their finance department"