Validate date in a spreadsheet before import (maatwebsite laravel-excel)

Hello,i'm trying to validate a date before import the infos to the database,i need to check if there's a date above today in the file but for some reason(might be a stupid mistake) my foreach loop only check the first index of the array and not all of them,i've searched everywhere for a solution but i couldn't find anything... My import function:

public function Import(Request $request){
    $count = 0;
    $today_carbon = Carbon::today()->toDateString();
    $request->validate(['file'=>'required|mimes:csv']);
    $file   = $request->file('file');
    $spreadsheet = Excel::toArray(new UserImport,$file);
    foreach($spreadsheet as $p){
        foreach($p as $i){
            $count++;
            $columns= count($i);
            $date_file = $i[2];
            if($today_carbon >= $date_file){
                Excel::import(new UserImport,$file);
                return redirect('form')->with('success','ok');
            }else{
                return redirect('form')->with('erro','error');
            }
            if($columns == 3){
                Excel::import(new UserImport,$file);
                return redirect('form')->with('success','ok');
            }else{
                return redirect('form')->with('erro','error');
            }
        }
    }
}

my import model function:

public function model(array $row){
    
        return new User([
            'name'    => $row[0], 
            'email' => $row[1],
            'sell_date' => $row[2]
        ]);  
}