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Consistent refusal. That they are not sure I will return after I visit

You need to show strong ties to homeland. For example, you can show your family has strong ties in country (properties, their job, their business, etc). You can also maybe show like a job letter for when you come back. This all needs to be mentioned in your statement of purpose. I would need to see the statement of purpose to kind of tell on what happened, also which country you're applying from.