Clarification please regarding dependent fees

Yesterday I paid the dependent fees online from my bank to moi but I made a mistake in the amount. I immediately clicked the refund option and it was processed.
I was told later that there is no refund for dependent fees and I may need to pay again.
Will I lose the previous amount? I am worried because I cannot afford to pay again.
Please clarify will my amount be refunded? How many days will it take?
Thank you for reading

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