The [liuggio bundle](https://github.com/liuggio/ExcelBundle/blob/master/Resources/config/services.yml) only creates the <code>phpexcel</code> service in the new 2.0 version. The service you refer to is the old 1.0.6 version, so I do not think that that is a good idea. 

I adjusted the response code a little bit, I found a little mistake there and I've removed the unneeded code (the sendContent and so). See f590fc7.