I applied for a UK visa in February and April 2017 to travel with my sister. However my application was initially refused, stating I might become an illegal immigrant. Once I sent further documents to prove that I will not, they rejected saying I do not have enough money. Again I sent proof that I am being sponsored by my sister and that all expenses on this trip are paid. They rejected that my source of money is not clear. I couldn't go with my sister.
Presently I have been offered a seat in a Master's course in New Zealand and I need to apply for a visa. I however do not have all copies of previous refusals. I do have my visa application numbers.
My question is, how can I get a copy of the visa refusal letter at the earliest?
Can someone please help?