My Commercial Vehicle Accident via third party.

I am a transporter. We transport temperature controlled products in india. I had given my 3 vehicle to a Person(xyz Company) on dedicated rent basis where, the driver was of "xyz" the road expenses was of "xyz" such as diesel, toll, etc. Here xyz used a non licensed driver for running one of my vehicle and that vehicle met with an accident, we didnt get insurance claim for that. So "xyz" told us that he will get vehicle repaired with his money and get the vehicle on road but he failed his 3 dates he mentioned. So i took back my other 2 vehicles from him as i caught 1 other vehicle was also driven by a non licensed person. And after this "xyz" asked me if we will sell our 1 of the 2 vehicles we called back. We agreed for rs 10 lakhs. he gave us a cheque and asked that not deposit. and latter paid via other mode of payment. And took the vehicle. But we didnt transfer the vehicle to his name as our 1st vehicle was still under him and still not on road. we used those 10 lakhs to repair that vehicle and got it on road. And we didnt transfer the vehicle to him. Now we consulted a lawyer as he was not paying us the accident repair amount thats why we considered those 10 lakhs as repairing cost and asked for our vehicle. Lawyer told us to deposit the cheque. And till now 2 cases has been filed and its been 3 years but i have not received any money nor "xyz" has any effect on him. So now please tell me what should i do now. as this case is disturbing in my day to day business. Has lawyer done the right thing, or this case is just messed up? (the above wrriten facts are well communicated over email with "xyz")