Tweak a jobber list by clicking checkbox and uncheck buttons on Laravel5

I am working on a job search project online with Laravel5. My problem is this: I want to tweak the jobber list by clicking on a category checkbox. But my jobber table is not directly related to the category table. Here is the structure jobberTable-> serviceCatTable-> CategoryTable. Please, I need your help. Here is a picture for illustrious

Here is the jobber model

class User extends Authenticatable

{ use Notifiable, EntrustUserTrait;

protected $fillable = [  'name', 'surname', 'email', 'phone', 
 'password','type', ];

protected $hidden = [ 'password', 'remember_token', ];

public function service(): BelongsTo
{
    return $this->belongsTo(Service::class);
}

}

Here is the service model

class Service extends Model

{ protected $fillable = ['category_id','name','description'];

public function category(): BelongsTo
{
    return $this->belongsTo(Category::class);
}

 public function users(): BelongsTo
{
    return $this->belongsToMany(User::class, 'service_id');
}

}

Here is the category model

class Category extends Model

{

protected $fillable = ['name','description','confirmed'];

public function service(): BelongsTo
{
    return $this->belongsTo(Service::class, 'category_id');
}

}

Please, I need your help. Thanks

via Chebli Mohamed