Contacting potential investors in a project, or the home government of an investor, can be done in many different ways. It often depends on how urgent the situation is, whether they have clear rules and procedures, whether they have an office in your country, whether you have a common language and culture and many other factors. Rather than trying to cover all possibilities here, we recommend contacting more experienced groups for help.
As a first step, you can contact Bankwatch. We will provide you with practical tips for the questions above and can direct you to other more relevant groups when necessary.