The rate for colombia mobile is 0.020 and the charged in many calls 0.045. I sent many emails to customer service and they don´t answer. here is a list of calls.
2011-06-09 16:22:37 € 0.270 +573142863351 SIP 00:05:57
2011-06-09 16:21:57 € 0.135 +573132082082 SIP 00:02:23
2011-06-09 16:16:48 € 0.140 +573124100565 SIP 00:06:45
2011-06-09 16:19:56 € 0.090 +573133123401 SIP 00:01:50
2011-06-09 16:20:43 € 0.045 +573105537074 SIP 00:00:35

2011-06-09 02:27:15 € 0.045 +573006274290 SIP 00:00:21
2011-06-09 02:25:30 € 0.045 +573125354849 SIP 00:01:00
2011-06-09 02:25:16 € 0.045 +573165621580 SIP 00:00:34
2011-06-09 02:23:20 € 0.090 +573142743313 SIP 00:01:06
2011-06-09 02:20:07 € 0.045 +573006274290 SIP 00:00:21
2011-06-09 02:15:48 € 0.090 +573108412031 SIP 00:01:48
2011-06-09 02:15:34 € 0.045 +573213023354 SIP 00:00:21
2011-06-09 02:12:48 € 0.045 +573015087890 SIP 00:00:46
2011-06-09 02:09:58 € 0.045 +573002171663 SIP 00:00:57
2011-06-09 01:55:14 € 0.045 +573167208725 SIP 00:00:19
2011-06-09 01:54:23 € 0.045 +573124414738 SIP 00:00:41
2011-06-09 01:54:43 € 0.045 +573002171663 SIP 00:00:18
2011-06-09 01:50:09 € 0.090 +573002595728 SIP 00:01:36
2011-06-09 01:20:38 € 0.160 +573112338831 SIP 00:07:02
2011-06-09 01:22:21 € 0.135 +573142746580 SIP 00:02:15
2011-06-09 01:18:03 € 0.180 +573142193710 SIP 00:03:51
2011-06-09 01:20:42 € 0.045 +573123469276 SIP 00:00:34
2011-06-09 02:32:03 € 0.090 +573203227057 SIP 00:01:37