How MTN ruined my Christmas

After 2 years of not seeing my family I was looking forward to spending Christmas with them. I was ready to leave for the airport and all that was needed to do was to request Uber. I needed to first load airtime with one of the 4 vouchers bought the night before. I did use 2 earlier but was not sure which.I loaded the airtime but entered the voucher numbers incorrectly 3 times and as a result was blocked from recharge for 24 hrs. I panicked as I had no other means of getting to the airport and could not contact uber. I tried to call the center but we all know this is impossible as all options are for self-service. With time running out I desperately tried to do a purchase via my banking app but that failed as well. Eventually the window period for me to get to the airport got smaller and smaller till eventually it was pointless as I would not make the flight. MTN what I don’t understand is a customer blocked only after3 options and why block this option for 24 Hours. Don’t you think this is drastic. In my case you are responsible for me missing my flight, and worse me spending Christmas alone and the disappointment of my family when I told them I'm not going to see them. I want a proper and valid explanation as to why a customer is barred from this option only after 3 attempts and why is it so difficult to get to speak to a consultant in an emergency and also who is going to bear the cost of me missing my flight. Mobile phones are for emergencies and whats the point if one cannot make a call in times of need. Really disappointed MTN