Mondo disappointing service

I did an application for an MTN deal online and an agent called me to assist. Set up the deal and I even accepted the Debi-check mandate already. This was over a week ago, to this day they have not given me any feedback, their so-called "customer service" line *** rings and rings but does not get answered, I have tried more than 8 times, and even now am sitting on hold for 15 minutes already, the line I was called from to do the deal cannot be called back, their online 'live-chat' is unhelpful. If I am not contacted today with feedback on what is happening then I want the deal cancelled, and no debit order - I repeat, NO DEBIT ORDER - for Mondo to go off my bank account.