Frustrated

I have been a loyal customer with Vodacom for years now and have had 7 lines that were about R2500.00 pm of which 6 came to and end so I canceled and was left with a data line of R399 pm. I decided that I want to upgrade my line and take an add on accessory, as well as an additional line, only to fine out they declined me because of a low portfolio. I don't understand stand how Vodacom can not provide goods customer service to their existing customers and yet they claim to be SA leading network. This is the worst customer service experience I've had. It's like they saying to me that they don't need my business. That's fine by me. I will gladly cancel my contract and port all 7 numbers to a better service provider.