Unprofessional and bad service

My wife got me a Lenovo tablet on contract from Vodacom Canal Walk. The tablet gave problems from day one. We took the device back to the store as it was still under warranty. We were told that the store does not deal with Lenovo products and we were given an email address to which we needed to send an email. The email was sent but we have, up to date have not recieved any response. The staff at Vodacom really had a don't care attitude which was completely the opposite when the contract was taken out.