Restaurant app 2 app with website and admin control

From four months I make agreement with Arabic company to make for me app for android and iOS The contract finish before 15 days to make 2 app for android 2 app iOS and website with CPanel they did not complete the agreement so I refuse to pay to them and I take half of my work I have the files of the work they make the apps kotlin language and Swift languages The The application idea is app Fish Application will link all fish shops Would all fish customer They suggest that it should be 2 Applications for iOS and Android one for customers other for fisher store that is mean 4 app and website and CPanel for website and app I think they finish 40 % from work I need you to finish it all pleas I want to make meeting vedio with you to see fills and discuss the price on time thanks