MTN keeps failing and customer service and its disgusting

I woke to my MTN account being suspended and as a result cannot conduct my business as a business person. My account is up to date as the last payment I did was on the 29th of October 2018. Since 8:30 I've tried getting through their 135 customer line for contract and the line just doesn't go through it's as though it's a dead end line. My customer experience withMTN is just utter regret to say the least.. In their quest to "Improve Customer Experience" I've had nothing but disgusting experience where even the Twitter "Customer Service" has not even come back to me to assist me.