Company not paying F&F

Hello experts. Please help me. I worked in a BPO for almost 1 year. Everything was good then suddenly due to some charge backs from US customers company suffered some loss. After that it started paying salary very late. Some times in pieces like 25% 25% four time. I left the organisation and I was promised that my remaining 50% salary of Aug i will get by Sept. But I never get that. I sent so many emails and they always reply as wait for some time we do not have any update. After 1 month they included that salary portion in my F&F amount and told me that I will get it in 1 month. I waited for 1 more month and whenever I call the HR she says to wait we do not have any update. After some days they send me a cheque collection date of 1 month later date. I waited for that day but when it was about to come they sent me one more email saying date has been postponed and we will let you know about the new date next month. It's been 5 months company is ignoring and just giving me dates. I have also heard that United states our company is sued. I m tensed how would I get my money. Please tell me. Any email or phone to organisation gives only one response that is wait for some days we don't have any update