Vodacom does not keep to its own deals

Two years ago we were sold a promotion deal with Vodacom Fibre where the salesman told us that it would be uncapped with no FUP. I specifically asked the salesman about this after he mentioned it and he confirmed it. Since then we have once had it throttled based on FUP but when I raised the issue it was fixed. In January I had an issue with our line and needed to set up a router. During the setting up of the router the technician told me that during the problem-solving process, they had again put a FUP throttle on our line. This is now causing problems on the line which is a 20Mbps line and normally runs at that speed. It has now started running at 8Mbps or less both up and down with no hardware changes or configuraiton changes which now again indicates throttling based on FUP.