Wipro Lighting — Played with my career

In December I got selected by wipro and they said they will give offer letter soon but nothing happened we called the hr again and again and everytime we got the different reasons like CTC is not fixed, recruitment is still going on, waiting for financial year to get over, and suddenly after 7 months they said we are not sure they just played with my career I was barred from sitting in the placements after that and now when hardly any company is coming and session going to get over they said why don't you sit for placements again I feel so frustrated cant we do anything to them if they were not sure then why they came to recruit at least I could have many chances