Unauthorized Debit After Returning Faulty Router Within 7 Days

I am extremely disappointed with the service (or lack thereof) from MTN regarding a recent contract cancellation. The Facts: October 6, 2025: I received a new router. The Issue: The router was completely faulty and would not connect at all. October 10, 2025: I returned the router and cancelled the contract (within 4 days of receipt). At the time of return, the agent explicitly assured me that because I was returning the device within the 7-day window, I would not be charged. Despite this clear agreement and the fact that I couldn't even use the service I signed up for, MTN has gone ahead and debited my account anyway. It is unacceptable to charge a customer for a faulty device that was returned well within the cooling-off period.