Phone order multiple issues

My contract is coming to an end. I wanted to upgrade to a Nokia 7+. I've tried phoning different local stores. They would say they don't have it in their store, but won't do the effort of checking if other stores have it. I would try upgrade online, nothing comes from that. I requested callbacks, nothing. I then randomly received a call from someone who said my contract is coming to an end. I then made the order with them. Should expect phone in 3-5 working days. 2 weeks later, still nothing. Request call backs, nothing. Ended up calling the help line. Person says my order was cancelled due to there not being stock, but I was not notified.

So in all aspect I'm finding there is no support and care. I would have thought that they would want me to extend my contract, but appears that it's not the case. If I can't get the phone that I've been trying to get for months, then why should I stay with Vodacom?