unwarranted, inexplicable suspensions and disconnections

in a decade or so as a MTN client and contract owner i have never made a late or incomplete payment, let alone missed a payment. in the past 3-4 months MTN has suspended my account and/or disconnected me due to an internal financial administrative matter that has nothing to do with relating to my supposed "credit limit" I am tired of calling MTN every month to reconnect me . I feel defeated. I feel invisible and dispensable, and i can't help but think i am not the only one.