How can I deactive the borrowing of airtime

I can't borrow data, despite not owing

i mistakenly borrowed airtime worth 5,000 from mtn and i want it reversed please

I borrowed #7500 worth of airtime from MTN yesterday and I paid back today but the borrowed airtime is not in my account. And while I tried to buy data plan with it yesterday...

I mistakenly borrowed 5,000 this morning from MTN and I really want it reversed please