Froud !! eMedia Bangladesh-Your Solution

hi
I dont know how much this can help, but i ll just hope for good....

so my self Mr.Mamun having own firm based in Bangladesh , Dhaka. few months ago a representative from company called " eMedia Bangladesh" based in Bangladesh Arif Hossain . he gave me a proposal for website design and we had finalized and also given a advance payment...and after that till today i have not received any design they have just register my domain name.....so after so many follow ups they have agreed to return my domain details and advance payment...but i didn't get anything till now....have also tried to call their head office as mentioned contacts on invoice which is also fake.....
Froud company detials : www.emedia.com.bd/

so just want to know that what you can help me for.....

Regards
Mamun