Clicking could be a sign of having not enough power. That's easy to solve using a powered hub and a Y-cable (with 2 USB-connectors on the PC site). Also, sometimes it simply starts working when connecting it to another PC.

If none of the two work it's a hardware issue. Then take the disk out of the enclosure and put it into another one or connect it via a USB to SATA-IDE cable.

If even that doesn't work (and there's a good chance it doesn't) you need to find a reliable data recovery company. I can't recommend any in Mozambique alas (although it's quite well possible there are). But some international chains (like drivesavers.com or krollontrack.com) certainly can do it if you send them the disk.

Not having a backup means you deliberately took the risk to loose that data or pay a lot for recovery. That's your own choice. It wouldn't have been mine.

Kees