MTN is really pathetic.

I pay MTN with my credit card. It has expired. They sms me asking for new credit card details. When you call 135 their customer care no, there is no option to speak to a person. ONLY RECORDED MESSAGES. How on earth am I to provide my credit card details. Then I facebook them. And the person messages me on facebook MESSENGER to ask for all my credit card details with CV number. Really?? Do they think I am crazy to give my credit card details and CV number to someone on Facebook messenger. What am I do to now?