Illegally suspended my secondary mobile connection

I have been as Vodafone customer for alsmost 8 + years and took first connection 8 years ago and second almost 5 years...these were taken under the corporate plan but these two connections taken separately and not under any offer together. To my convinience I have added both these no as contract on the Vodafone app so the payment is done at once. Recently I had a Service issue on primary no due to which I did not paid outstanding amount and my no was suspended and disconnected ...I am ok for the same however I am disappointed that my secondary no is also disconnected even though I made a request to unnerve these accounts so I can pay my outstanding on secondary no but they showed helplessness and said it won’t be possible unless I clear my primary outstanding bill , which I feel is I’m unfair trade practice as there was no compulsion that due to one contract default it should have an impact on secondary . Kindly let me know if there is provision to do the same without sending any jnimation to customer on change in terms and conditions after the contracts were merged and not entertaining I merge option even though request was made.