New cellphone contract

I called vodacom online last week Wednesday for a new cellphone contract, on Thursday while writing exam I missed their call but my mother told them that I'm writing and they consultant said he/she called again on Friday until today i haven't received any call from Vodacom. I call them on Tuesday for application feedback and I was told that I wasn't reachable for confirmation and within 24 hours I should receive a call from vodacom now it's 36 hours later still no call. I just want to cancel the application, I am no longer interested