Merchants Cell C poor Services failed call backs

Promised many call backs . No responses from any of the staff . Still do not have a device for over a month . 2 devices handed back to Samsung due to the same fault . Was promised a call back from the Operations Manager at Merchants Cell C call center Nthombi Nasimini and she failed to call me back going over two weeks now . I called her now and she says that she was just thinking to call me back . Cell C is still charging me . I need serious action taken . I am having alot of challenges with Cell C customer care services .