Vodacom worst customer service

I’ve recieved the worst service from Vodacom trying to upgrade my phone which was due for upgrade since October 2017. The consultants when calling vodacom business do not return my calls as promised and I’ve been struggling to upgrade my phone since Wednesday 10/10/18. I’ve got multiple contracts with Vodacom and they are currently requesting to pay the month of October (which is not due yet) to be able to do my upgrade on my line. I’ve got no amount in arrears on any of my contracts and the consultants can’t tell me why this is like that.. this is appalling service as I’ve been a Vodacom client for more than 10years. I’ve exlamated the fact numerous times that the upgrade is urgent as I’m loosing a lot of business due to my damaged phone, however I’m still struggling to get any solid feedback since last week Wednesday .. I find it ridiculous that Vodacom expects me to pay my account for October and the month is only half way through!!???