Failure to notify me about my device and refund

On 20/10/2015 I bought a Mobicel Hero Keyboard Bundle at Hi-Online and received it on the 21/10/2015. I checked the tablet & found that the front camera didn't work.I then called Mobicel for assistance & they sent me a picture of what I should look for in order to use the front camera of the tablet but the option wasn't there. Mobicel then advised that the tablet might be faulty and I must return it where I bought it. I took the tablet to the Foschini store in Pretoria Church Street on the 23/10/2015. They told me that they will send it back to but they didn't take the returns form that came with the package.The device was checked at the store as well and even rebooted but the front camera still failed to work. They said it was an 'out of box failure'. They told me that they don't know what's the procedure of returning an online device &I was promised that someone from that branch will call me the next Monday but they never did and their telephone line doesn't seem to work at all. Can someone please tell me where my tablet is at, what's happening and when will I be refunded because it's been 2 weeks and Hi-Online never received that tablet from Church Street. I need an answer NOW!