Yellodata offers invalid specials then sells customer info to other companies for debit orders

I got a call from a yellodata agent , Terence Naidoo , who offered me a 3gig data special at R129 per month. No contract. A month to month agreement. I gave him my banking details for a debit order and then he said there will be other small perks with this offer. Extra facilities that I will probably not need but they are free so no problem. Why not? On the day of the debit order 7 different companies, including yellodata had debited my account with various amounts. Some were paid , others were rejected with insufficient fund resulting with the bank charging me mostly triple the amounts they were debiting for each unpaid debit order. I called the call centre. Spoke to a different agent and she told me I actually do not qualify for the special and she will cancel the contract. Till today nothing has happened and my account is now in debit and the money they took is still not refunded. I have requested , unsuccessfuly, to get a name for someone higher than the call centre agent but they will not give me any name. So I am stuck with the call centre agents and they are not able to do anything. PLEASE when you see or hear the word YELLODATA. DROP THE PHONE, GET OUT OF THE WEBSITE. THE COMPANY IS A **** TO GET CUSTOMER INFO.