Unsatisfactory service

I have been client from Vodacom for 12 years. Never did I neglect to pay my account nor did I complain. I cancelled one of my contracts recently as the advise I received from sales is that it is better to cancel my contract and start a new line as I wanted to change my number. Now when I app**** for the new line I am being declined and also being told to phone 082111, *** and many more. I got hold of the vetting department and they said that they cannot help me. I then request upgrade quotes on all my lines so that I can go to Cell C and then I was told yet again They cannot assist me. I then requested for my line to be re-activated that I cancelled and was told to call *** and they tell me that they cannot assist me either. So I came to the conclusion that Vodacom wants me to upgrade everytime but when I need them to assist me they are never able to help me. I have never been so disgusted in a company as in Vodacom.