No internet access with mobile network

Hi guys,
I'm from country that has not support from BB, then I cannot use any data plan or even blackberry app world an messenger, SO
newly i stuck with internet problem on my curve 9360, few weeks ago i could use my BB browser with ANWORM's service book and every app such as BB "default browser" and "WhatsApp" and "UCbrowser" works fine with mobile network, but now i have no internet access in any of my app even whatsapp and UCbrowser, when i try to connect internet, default browser give me this error "unable to find requested server". i try multiple ways (update OS, using leaked OS, hard reset and ...) to solve this big problem but every time I've got fail.
and yeah, my device shows "edge" not EDGE next to signal indicator.
my wireless service provider (Sim Operator) is MTNirancell and it has EDGE support and it's APN is mtnirancell.
please help me, what can i do???
any help will be greatly appreciated.