Paying for two items, whereas am given one item

I bought a Hi-sense TV around February last year (2014) i choose to pay it for 12 months, unfortunately the TV was not of good quality because i reported it around four times and they requested to change the brand to Sinotec. due to the quality of both brands i was not satisfied i requested Samsung. By the time I was left with R1 800 to settle the account, the agreement was that they will give me Samsung but they will add a little extra money on the account since the brand is a little bit higher compared to the initial brand. we did all the paper work, i was stunted by having to settle the initial account first, before i could pay the extra money that they added on the account. the even called me to ask if i bought a TV. It seems like i am now paying for Second TV.<br> Your assistance will be highly appreciated<br> <br> Regards Concerned Customer: Phetla Kamogelo Emma<br>