Pathetic service

What pathetic service. We upgraded online. It took over a month to sort out because no one at MTN “can” help cause it’s an online order. Eventually got my phone delivery. Another month has passed and I still haven’t received my balance of the upgrade. A speaker. Once again it’s an online order so every person at MTN passes the buck. What a joke. I think this will be my last upgrade. If an up grade take two months to get sorted and with a massive fight ?? What am I to do....