I feel sorry for you. I wonder if you could message them to plead your case. But on their intro page they are very strict about no refunds. Especially:

• There are no refunds, period. If you send the incorrect amount, consider it a donation.

It seems the amounts that sucessfully get upvotes from randowhale's steemd page are 1 and 2 SDB. They will probably claim that you have sent an incorrect amount. Well, at least @minnowbooster does refunds.
You can also see that at the time you posted @randowhale's Voting Power was very low so I'm not sure if it's even profitable use that service when the voting power is so low.
I'm giving you a small sympathy upvote. Peace.