***** Makro no safety measures

If you ever want to open makro account or credit card think twice, I open a makro credit card more than a year ago, used it once. It is safely in my possession. On Saturday 8 January I received sms from makro purchased made off amount R19 000 on makro credit card at Incredible connection. I was shocked, worked that day. Phoned credit card division, purchased was made in Johannesburg, I live in Cape Town Brackenfell, still have not heard anything back from them, cause investigation has to be done. How can they allow such a purchase without signature for that amount? Or a card, what safety measures does makro have? None