reliable retirement agency and fee

I am from south korea. I am planning to retire in bali. I went to immigration and met a person who works at agency. He introduce his friend and she said all the cost is 8 milion rupia. I wanted to visit their office but she said if i visit office the service fee will be going high. I feel confused. I want to make it surely in order to escape any problems later. Could anyone introduce relaible and reasonable agent?
Thank you in advance.

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