2 days ago I received a mail from fiverr that they have disabled my account and also they have not mentioned the reason please help me what can i do to reopen my account
Nobody on the forum can help you with this.
You need to contact Customer Support: http://www.fiverr.com/support_tickets/new
May be you break T.o.s of fiverr
Only fiverr support can help you to give the reason but usually their decision is final and you wouldn’t be able to reopen your account