Debit order without purchasing

On the 15/05/2015 A debit order went through to my bank account with an amount of R935.21from Fonechoice, which shocked me, because I have never purchased anything from Fonechoice ever. I have an account with Homechoice which I stopped using years ago. I then called Fonechoice, they confirmed the debit order, they said I purchased 2 laptops. I asked for a delivery address, they gave me an address I have never heard of before, I asked for the delivery note, the consultant answered that that could be anybody because they deliver to anyone, which was new to me because on my previous encounter with Homechoice you had to show your ID on delivery. I asked that they investigate which they said they would. I asked my bank to effect a stop payment. 10/06/2015 another debit order of R935.21 went through, different ref no. I called Fonechoice again, this consultant gave me a different delivery address to the previous call, the previous consultant didn 't even initiate the investigation, they promised an investigation and a stop payment as per the current consultant another debit order went through 10/07/2015 and I am simply upset with Fonechoice's empty promises, please help me Hellopeter