Vip trade

I make this suggestion because I bought the m4 predator by mistake and did not know that refunds were made after 15 days, I would really like to see if they could change it for another m4 since the effects of the predator are not very good, let's say and it is not the first option nor the best for a hm x or mutation mode, I would like to know if there is a possibility of reimbursing it to buy another vip or exchange it for another or m4, thanks.