Vodacom's customer service has deteriorated to no longer being service

Vodacom customer care has gone down the drain - in the last two weeks I have been promised four separate times that various people would phone me, none of them have phoned me. I have been trying to resolve one issue for over two weeks, and there is no resolution - or even general service - being given. Not even loyalty changes their service levels - I have had the same number for just shy of seventeen years, with just under twelve of those years being on contract. This is appalling.