laravel5.3 job（发送回调时捕获异常），延迟不起作用

I work with jobs to send back webrequests (GET) to urls a user defined. To save load of my server I would like to disable the API access of user after 5 retrys (which all failed). Here's the full code of my job (excluding imports & some code parts that are unnecessary (disabling API access etc.).

use Exception;

class SendGetCallback implements ShouldQueue
{
use InteractsWithQueue, Queueable, SerializesModels;

public $address;
public $new_transaction;

//Address $address, Transaction $new_transaction
public function __construct ($address, $new_transaction)
{
    $this->address = $address;
    $this->new_transaction = $new_transaction;
}

public function handle()
{
    Log::info("run: " . $this->attempts());
    if ($this->attempts() <= 5) {

        if ($this->attempts() > 1) {
            Log::info("retry part");

            //retry to send the callback
            try{
                Log::info("try part");

                //prepare webrequest

                if ($res->getStatusCode() != 200 || $res->getBody()->getContents() != "*ok*")
                    throw new Exception('callback url not reachable');

            }
            //if job failed again, release job after 300 seconds
            catch(Exception $e){
                Log::info("catch part");
                $this->release(300);
            }
        }
        //first run of job, just process normal
        else{

            //prepare webrequest

            if ($res->getStatusCode() != 200 || $res->getBody()->getContents() != "*ok*")
                throw new Exception('callback url not reachable');

        }
    }
    //disable API access and inform user
    else{
        Log::info("disable access");
        Mail::to($this->address->user->email)->send(new ApiAccessDisabled($this->address->user, $this->address->merchant_access));

        $merchant_access = MerchantAccess::where('id', $this->address->merchant_access->id)->first();

        $merchant_access->update([
            'is_online' => false,
            ]);
    }
}

public function failed(Exception $exception)
{
    Log::info("failed called!");
}
}

For some reason the delay I use didn't work I think. The jobs just runs down without waiting.

Here's a part of the logfile:

[2017-01-01 18:25:02] local.INFO: run: 2  
[2017-01-01 18:25:02] local.INFO: retry part
[2017-01-01 18:25:02] local.INFO: try part  
[2017-01-01 18:25:03] local.INFO: catch part  
[2017-01-01 18:25:14] local.INFO: run: 3  
[2017-01-01 18:25:14] local.INFO: retry part 
[2017-01-01 18:25:14] local.INFO: try part  
[2017-01-01 18:25:14] local.INFO: catch part  
[2017-01-01 18:25:24] local.INFO: run: 4  
[2017-01-01 18:25:24] local.INFO: retry part  
[2017-01-01 18:25:24] local.INFO: try part  
[2017-01-01 18:25:24] local.INFO: catch part  
[2017-01-01 18:25:35] local.INFO: run: 5  
[2017-01-01 18:25:35] local.INFO: retry part
[2017-01-01 18:25:35] local.INFO: try part  
[2017-01-01 18:25:35] local.INFO: catch part  
[2017-01-01 18:25:45] local.INFO: run: 6  
[2017-01-01 18:25:45] local.INFO: disable access  

Any idea where things go wrong? Here's how the handle() method should work:

-->check if the run of the get request fails, for example when webserver of user is offline (throws exception) ->if yes set delay for job in 5 minutes

-->if job was runned for 5 times the api access should be disabled (working fine)