How to escape additional headers in xlsx file

Hi, iam using laravel excel reader https://github.com/Maatwebsite/Laravel-Excel to upload xlsx file. it is working fine.But i have one problem.Problem is what if user added a extra rows in excel file and uploads the file ,my current code gives error for this situation.How can i ignore user defined extra fields and save file in database table ,how should i change my code please help me.

currently there are two rows billing_operator and billing_operator_name,if user add extra rows in excel file say udf1 and `````udf2 ,it needs to ignore this fields and and uploads . onlybilling_operatorandbilling_operator_name```

public function postOperatorFiles(OperatorFileRequest $request)
    {
    if($request->hasFile('file'))
        {
            $fileName= rand(1000,10000). '.' . $request->file('file')->getClientOriginalExtension();
        
            $filePath = base_path() . '/crosswalk/';

            $request->file('file')->move($filePath ,$fileName );
        
            $filePath.= $fileName;

            $results = \Excel::load($filePath)->get(); 
            $date = date('Y-M-D');
           

            foreach($results as $rows)
            {
                foreach($rows as $row)
                {             
                    $this->operatorFiles->create([
                    
                        'source_file_name'=>$filePath,
                        'imported_date'=>$date,
                        'operator_code'=>$row->billing_operator,
                        'operator_name'=>$row->billing_operator_name
                       
                    ]);

                
               }

            }

      
        }
        return redirect::back()->with(['message'=>' File Uploaded SuccessFully!']);
    }
}

If file contains any extra headers, it throws exception. How to handle that expection