Assessment of the judicial perspective of the case

The judicial perspective of the case in the GP dispute should be assessed. I am a natural person owner of a land plot in DNT. With the company affiliated with the seller of land (as I assume) was signed an agreement on connecting the site to the gas. The work was to be completed at the end of 2014. At the moment, the work has not been completed, and the services have already been fully paid for. The question is that there is a suspicion that the company is just technical and suing her for a refund makes no sense. It is necessary to assess the prospects of the case in terms of the performance of the services stated in the contract or the return of the money paid.