Money taken from my account still no feedback

I app**** for a contract on the Telkom store app on the internet and received a call from Ncobile using *** to finalise the deal. This was on the 29th. The first thing she said is that R259 will be debited on my bank account before a delivery can be done. My money has been debited and havent heard anything ever since. I was promised a phone call on Friday the 2nd of October but still nothing. I tried calling the number above but it rings and gets cut off. I was not given any reference number so that i can follow up. I want my money deposited back into my account and cancel this so called contract which i even doubt that it exists.