Customer UNSatisfaction

I ordered a Tablet online on 4/3/2016 and received a call the next week to say it would be delivered in 5 - 7 days. I spoke to ZAMA on 17th March and was told Tablet is on back order but they have in stock and she would arrange to send the next day and would call me 9 oclock on Friday 18th. I am still waiting for Zama to give me a call. I phoned on 24th to be told Vodacom is OFFLINE and they cannot help me. Phoned again today and after going from one dept to the next and being refused to speak to a manager have been told RAM sent the Tablet back and they must now cancel the order and re-order again. One department does not know what the next department is doing and there Customer Care is Non Existant.