Settled loan but still debited

I settled my MobiMoney account this week and upon getting my salary I was still debited. These kinds of things should warrant an instantaneous stoppage of the debit. I should have to be running around now to get my money back. FinChoice confirmed the settlement was reflecting on their side via email, and yet I was still debited. I want my money paid back immediately and don't want to have to chase down anybody. Kindly see that this is rectified.