What you need is a "Flat Rate Repair" from Apple. It should cost about $320 US. plus some shipping. Since you don't have an Apple Store in Bangladesh, I would call the one in India, here: India
(91) 1800 4250 744
Let us know if this fails and some of the guys on this site might be able to figure out a work around.
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Here's the numbers for Apple around the world: http://support.apple.com/en-us/HT201232
What you need is a "Flat Rate Repair" from Apple. It should cost about $320 US. plus some shipping. Since you don't have an Apple Store in Bangladesh, I would call the one in India, here: India
(91) 1800 4250 744
Let us know if this fails and some of the guys on this site might be able to figure out a work around.