Bad service

Hi, I recently got a call from a Mondo agent offering me a phone contract and I got tempted and took it, however now after reading about your bad service review I no longer want the contract. I haven't received the device yet but the admin fee has been debited from my account, I want to cancel everything before it even arrives. I've been trying to call their call centre with no one picking up that I ended up spending close to a R100 airtime waiting and I sent an email but no reply.