Unfair decision by Service provider

I have been with Virgin Mobile a few years and have 5 contracts with them and even my wife has a contract with Virgin mobile. I have always done early upgrades and never had problems,now all of a sudden when I want to upgrade to the new Samsung S6 they tell me I must get a new line! I asked them then give me a new line but I want to port one of my numbers and now they tell me because my debit order didnt go through I must wait for 6 months before trying again. I think this is a load of trash I spend over R2800 if not more on my contracts excluding my wife's contract and now I get treated like this. I admit my debit orders sometimes were late but I always pay my account and I really think these people are being unreasonable. I think there should be ways to help customers in this case and I also say if I never was such a loyal supporter of Virgin Mobile they could refuse me but to refuse me for nonsense is pathetic. Please can someone give me a managers or Carte Blanches tel number or email address as I would like to hear what they say about this issue.