Frustrated

I’m extremely frustrated with MTN. I’m due for a contract upgrade, but my account is showing that there is an arrangement in place, which is preventing me from upgrading my contract. There is no outstanding amount on my account. The only amount currently showing as due relates to the new invoice cycle. Can someone from MTN please look into this and contact me urgently to resolve the issue? Contact number: ***3 I would really appreciate some assistance, as I’ve been trying to resolve this without success.