Dacia Canceled My Warranty for Duster Due to Missing Invoices

I took my 2023 model Dacia Duster 1.0 TCe to the service because the engine revs were dropping and the car was unresponsive when I pressed the gas pedal. They said there was a fault in one part and repaired it under warranty. However, the same issue occurred again just a week later, so I brought it back to the service. This time, they told me the engine needed to be replaced and asked for maintenance invoices. Since I didn’t have the invoices but offered the service receipts instead, they refused to accept them, canceled my vehicle’s warranty, and returned the car to the Renault Acar Terazidere branch. I had to take the car back with a tow truck. What should I do?