Lies and bad service

I went onto vodacom website to upgrade 2 contracts and completed the call me back option. I then got call from lady from MOndo to do the upgrade for me. During the conversation we agreed to upgrade to Vodacom Smart tAB 10.1, everything plus verification was done delivery was confirmed for 3-5 days. a couple of minutes later I get a call to confirm that the Tab 10.1 is not in stock but she can offer me the Vodafone Tab N8 on 500mb topup at R99 and there is stock. She confirmed yet again delivery within 3-5 days. She also promised that the agreement and document would be emailed immediately to me. This was yesterday morning, I called this morning (29/08/2018) to find out where is my document, and to confirm delivery before Friday. Yet then was informed that the Vodafone Tab N8 is on back order and they cannot confirm when delivery will be as vodacom is awaiting stock - so the consultant who did the upgrade blatantly **** to me. I then went onto Facebook and send messenger and was then told noone can call me back I must cal you. Well many rands later I got hold of your call centre only to then be told all the managers are in meeting, I wonder if I have bad timing as everything single time no matter what time of day when I call and ask to speak to manage they are apparently in meetings. All of this is costing me money and stress which I do not need. and yet Mondo places all the risk and costs on the customer with no option for them to call you back, I am currently holding over 17 minutes and still not cancelled. I expect a call back immediatly and both my upgrades cancelled immediatly ********** 190 and ********** 663. I am going to a VODACOM shop which has stock within the next 2 hours and if I cannot upgrade there because you have not cancelled on your side because of all your lies etc, This complaint will gO further and will be published on all social platforms I have access to, and I will also inform Vodacom themselves and will not rest until our contract with them is cancelled.