Hi Alex, thanks for taking the time to share your feedback. I know it’s not always an easy thing to do 
The one thing I would like to clarify is that you are not an “unsecured creditor to Mondo”. We never get to touch the money and nobody is borrowing it from you.
Wirecard is simply holding the money for you. They don’t get to invest it or use it in any way. You are the owner of a prepaid debit MasterCard issued by Wirecard Card Solutions Ltd. Wirecard is a licensed e-money issuer. We are but one of many prepaid card programs that Wirecard issues cards for and we offer the same guarantees as any other prepaid card.
Your money sits in a ring-fenced account that Wirecard controls. In case they go into administration, Wirecard’s creditors do not have access to your money and you will get it back. We cannot, however, prevent Wirecard, or even the bank they store your money in, from losing your money through negligence or to criminals. That is why we have to warn our customers. We were told that it is safe to tell our customers that money stored on a prepaid card is “safer than cash”. It is just not insured by a third party in the same way balances on a current account are (although we do offer that informal promise that Tristan mentioned to cover any losses from our own pocket)
Hope this helps