Vodacom had double standards

I am trying to upgrade a contract I have had for more than 16 years now. I am currently under debt review, and now Vodacom is declining my request to upgrade. They upgraded this contract before while I was under debt review, and now they suddenly can't. The account is always paid in full. When you call the call centre all they can tell me is that I am due for an upgrade. Your cellphone contract is not part of the debt review contract as you put it in as your monthly expenses. Vodacom is discriminating against people that are under debt review. This is no way to treat a loyal customer.