Unfortunately, the funds cannot be transferred to another virtual card. However, the Administrator of your account can increase the amount of your card, you just need to send a request. Follow these steps to send and receive funds on the Mobile app or if you are using the web:
Go to Cards and click on Request or Send funds.
Then select a budget and card. After filling in the amount click on continue and wait for approval from your Administrator.
If you need assistance do not hesitate to contact support.