How / What to take Legal Action , My Business partner done Fraud

I have started my Pvt Ltd company ( Travel company ) in 2015 in Delhi & in this company i have made my elder brother as silent partner with 10% of company Share . In 2017 i have added 2 more friend as as partner & profit share of 15% each person.But as mutual understanding we decided that we will share the profit in 3 equal part but there is no any written documents for the same. We was working hard & growing our business with our best work .In July 2019 i was out of city due to family function & once i came back to Delhi i found that my both partner ( Both friend ) started new company with our all the employ without any prior information or intimation to me . they have mail me that we can only transfer the 15% share to you when you will pay me 10 Lakh & 15 Lakh . From the market ( Client ) i got information that they are contacting with our client & saying that we are new branch of previous company Please help Me what Legal action i can take on my partners , i am feeling totally help