terrible service

Received a phone call from Elite mobile services offering me a Smart Tab 3Gblack. When it was delivered 29 March 2016 I deciced not to take up the offer and sent an email to Vodacom. All I get back is email saying that someone will phone me to date I have been having trouble getting any help from Vodacom . Sent numerous emails made phonecalls but no one seems interested once they hear that I don't want the contract. I had several calls and one they hear I want to cancel they just put the phone down. I managed to find Elite Mobile number and I was told that as I have already attempt to cancel it with Vodacom they cannot help me. Promises to phone me back, I'm still waiting!!! The package is still unopened and need your help as I do not want the Smart tab 3G . What am I supposed to do.I was also told that once the simcard is activated the account will be active. No I have received an invoice dated 29/3/2016 Must say the service I have received stinks and if that is the way Vodacom treats their customers I'm not interested Please help as I cannot spend more money in phoning and get nowhere