Cell c... Worst provider ever

Cell c, u think this life is a joke, how the hell do u permanently cancelled a number of which the contract ended and was paid up, please activate my numbers,I don't owe u a penny, all my businesses are linked to these numbers, after many many calls and emails, even visited your branches and yet nobody can assist, cell c don't even bother to call me back, useless provider. Wish I never ported my numbers to cell c.