Failure to cancel online order after multiple attempts

I ordered something online at Foschini on 9 August at 16:13. I saw that they actually had a special and i decided on different items to get the discount and i tried to cancel the order online as i usually do but it wouldn't allow me as it said that they have technical problems and then i tried to email them at 17:22 but got an automated response. On 10 August at 8:05 i called the online queries number and spoke to Kezia about cancelling the order and she even gave me a reference number and that she would call me back and never did but the order just went ahead and i received invoices for it. I then called again and i spoke to Kezia again and she told me she logged the cancellation and i had to send something through but the call dropped to me having insufficient airtime. More than R25 airtime was finished trying to get an order cancelled and nothing. When the call went off i was never even called back as the order has a number attached to it. I was placed on hold so much that all the airtime was finished but nothing was achieved and this is what i call poor service