FNB (First National Bank) auto customer services has out grown it's actual human capability

I have a FNB Connect account that has been inactive for months, although I admit from time to time my monthly payments are not made on the due date, I always endeavor to make the payment and bring the account up to date. Yet FNB Connect are unable to re-activate the SIM card for reasons not even they know why. They continue harassing me for payments (which indecently I have already made) on a service they unable to deliver. Trying to navigate through their 'auto answering service' or communicate with a human for a remedy is virtually impossible, Can't wait for the contract to end, so I can change to a cellular network that delivers on what they advocate and knows their game with customer services.