I need send a Fax

I need find a place where I can send a Fax(yeah, I know),  can't be this online services, someone know a place near to Manga neighborhood? Kind regards

You could just ask around?  Try here for a start, if they can't do it they probably know who/where it can be done.  They are in the south end of barrio Manga:

Digital Cartagena
Cl. 28 #24-23, Cartagena, Provincia de Cartagena, Bolívar, Colombia
+57 5 6907470
www.digitalprintcartagena.com

Also try
Deprisa - office supply store, east side of Manga, 2 blocks west of Puente Jiménez
69, local 3, Cra. 22 #29, Provincia de Cartagena, Bolívar, Colombia
+57 5 6600181