Car problem

Good day My name is Nothando Mgidi last year October I bought Toyota Uber Cruiser and the this year June it's stated giving problem so I took the car to the dealership and they told me it has problem with Water pump they change it after 2 days it's came back the car started overheating i call them they took it back for reaper till today i have not receive the car back can you please assist me it's been 4 months now paying for the car I don't use