Horrible service and products

I bought a tablet online, it was delivered and I signed it without opening it. When I opened it once the delivery person had left I discovered that the was no USB cable for the charger. I immediately called their customer service numbers and I spoke to a lady by the name of Jody. She said I must just go to any hifi corp shop and explain to them and I will be assisted. I asked for a reference number for follow up and as proof that I did call. She said there will be no need for one and I will be helped. After a day of using the tablet it started to give me problems and I wanted to return it as I wasn't happy with the functionality. I went to the shop and when I told them the story with the USB cable they said they cannot exchange or refund it because of the missing USB cable. 80% of my shopping is online and never have I received such appalling service in all my purchases. The lady was also rude at the shop. The call center never logged my complaint and there is no reference number for a follow up. Now I am stuck with a tablet that I don't want. Never will I buy stuff from Hifi corp again