Refund not credited

Groupon owes me a credit of R500. After several calls (being on hold for long periods of time), emails, website complaints - they have failed to rectify the issue and credit my Groupon account. They have, on several occasions, stated that \it is resolved"or \""it should be fine now\"". This has been going since the year 2013. I am disgusted at how they can be so *********** bordering on down right stupid. A simple credit can not be resolved??? At this point I am dead set on informing publications and several advertsiing sites on the pathetic level of service. """