Pls help i want to cancel my refund request

[Caregiverjan]

I overpay my temporary visa application. I include study permit fee for my minors, i just learned later that minors are exempted. I request for refund for the study permit amount but then i request for the whole receipt to be refunded. I was not able to verify that they will just return the excess amount. Pls help me what to do. I want to cancel my refund request. Its almost 48hrs but my credit amount of my cc s has not yet been refunded thats why i wanted to cancel and just wait after processing