KWD Currency payment charge less amount

so my client’s website main currency is AED. We have multiple currencies on the website but the issue is when a customer purchases an order in KWD it charges them less amount. for example the order costs 50 KWD but it charges the customer 5 KWD only! which is 10 times less amount than the real one.
I am looking for a solution but did not reach any! It would be great if you have the solution.
Thanks in advance!