We were in the same situarion. Paid a big deposit, but owed final payment which we didn't want to pay as was going to a wedding in the states which is now cancelled. We took a voucher valid for the next 18 months. We thought if Trump opens up the USA soon and the flights were not cancelled we would lose all our money. We know our travel agent, the flight centre, didn't have to refund the deposit in any form so i feel to quite lucky after hearing how some customers have been treated.