Billed for airtime not received

I purchased R160 worth of data using the Edgars OTA service but I am yet to receive the sms with the voucher pin.I called into both Edgars customer care and OTA customer service.Never in my life have I seen such a non-existent desire to assist!Spoke to a Nonhlanhla at OTA who evidently couldn't wait to get me off the line.She went on to say I should await a call from a consultant who will call me to rectify the problem.An hour later,I'm still waiting for that phone call.What I don't get is the logic behind me incurring further airtime costs all in an attempt to get a purchase that is rightfully mine.I also don't get how Edgars was so eager to distance itself from the malfunction when they in fact endorse the service.I was an Edgars customer before I even got to know of OTA!If the service is faulty then don't debit my account.If you're going to partner with an entity at least ensure they have decent customer service.I'm beyond frustrated and angered by this whole experience.Kindly assist by providing me with a credit to my account or a voucher pin and not a case reference number!