I Have Paid 1.5 Lack To Consultant

I have paid 1.5 lack to start my Luxembourg work permit process.The consultant has made a contract for the work permit , as per that no refund, the consultant told me that I will get an offer letter within two months for Luxembourg and total processing time for work permit 6 to 7 month , this 7 month going on still i didn't get offer letter also , I am calling there team to know when I will get my offer letter for Luxembourg just team is telling I will ask and let you know but no proper response , but they told me at time of staring that you will get offer letter within in 2 months this is 7 month is going on I am not getting any proper response from last 3 months there are telling that you will get offer letter at the end of the month they are saying this from past 3 months but still i didn't get offer letter so what can I do in this case , I am calling daily 3 to 4 times just They team members will tell that they will ask him get back , so response ofter that